Published May 18, 2026 08:35AM<\/p>\n<\/div>\n
May 2026 Update:<\/i><\/b> After months of testing, we selected seven new running shirts and tank tops and updated availability and pricing information on four still-outstanding options. The Patagonia Cap Cool Ultra<\/a> won best running top overall, while Adidas, Proof, Cotopaxi, and Flipbelt all earned a spot. Our testers also recommended two Ciele shirts\u2014one as runner-up for best singlet and one as the best splurge tee. <\/i>We again called on the <\/i>Outside Lab<\/i><\/a> for objective lab measurements on air permeability and dry time, and added a new metric: breathability.<\/i> Be sure to check out the \u201cHow We Test\u201d section below for more details on our methodologies and how to interpret the lab data.<\/i><\/p>\n As the days get longer and warmer, it\u2019s time to stow away those long-sleeve shirts and update your gear for summer. In the heat and humidity of the sunniest season, having the right running top can keep you cooler and drier while making you feel fast and fashionable. Today\u2019s running shirts are softer, lighter, and better at managing moisture than shirts from just a few years ago. We tested dozens of new short-sleeve t-shirts and tank tops to find the best men\u2019s running shirts for summer.<\/p>\n <\/p>\n <\/p>\n \u00a0<\/p>\n Sizing:<\/strong> XS-2XL Pros and Cons<\/strong> <\/section>\n There\u2019s something about a light, airy running singlet that makes you feel fast. No other singlet captured this sensation better than the Adidas Adizero Running Singlet. Made from a thin, lightweight blend of 86 percent recycled polyester and 14 percent elastane, the fabric feels phenomenal\u2014smooth and silky, easily moving over the skin. Testers praised its soft touch and barely-there sensation, with one noting it as \u201cthe lightest and most comfortable singlet I\u2019ve ever worn.\u201d<\/p>\n The fit is slightly slim, but thanks to the stretchy fabric and side slits in the hem, the running tank top offers exceptional mobility. I prefer a slightly looser cut, and my typical men\u2019s medium fit that bill perfectly.<\/p>\n The entire singlet has tiny holes in the face that enhance its breathability. Testers enjoyed its airy feel but noted that the fabric tends to stick to the skin when fully soaked through, a common issue among most super-thin shirts tested. However, it dried exceptionally quickly. Overall, this stylish, comfortable running singlet stood out as one of the best we tested, one we reached for often.<\/p>\n <\/p>\n Sizing:<\/strong> XS-XL Pros and Cons<\/strong> <\/section>\n For a company that built its reputation on hats, Ciele produces some of the best running apparel. At $115, the Ciele ICNSinglet asks a lot from your wallet, but you\u2019d be hard-pressed to find another as free-flowing, comfortable, and adept at heat management. \u201cThe shirt felt amazing. Definitely a great choice for warmer climates,\u201d said one Southern California tester.<\/p>\n The fabric is Ciele\u2019s carbon-embedded fabric, made with 86 percent recycled polyester, 10 percent elastane, 3 percent polyester, and 1 percent carbon. The brand says carbon is naturally antimicrobial and absorbs odors better than polyester alone. Running in beaming sunshine, the singlet breathed exceptionally well. The fabric features a slightly see-through grid pattern that never felt heavy with sweat. \u201cThe ICNSinglet stayed loose, dried quickly, and made for a great run every time I wore it,\u201d said a tester.<\/p>\n Finer touches, such as a welded seam to prevent chaffing, reflective details for better night visibility, and an overall weight of just under two ounces, set this running singlet apart from the less expensive options. For those really hot and humid days, this is by far the best running tank top.<\/p>\n <\/p>\n Sizing:<\/strong> XS-XXL Pros and Cons<\/strong> <\/section>\n Displaying the precision and craftsmanship of a top runway fashion designer, SOAR\u2019s Race Vest is a masterclass in high-performance running apparel. If you\u2019re looking to turn heads on race day and stand out from the crowd, this is sure to draw attention. I\u2019ve gotten more compliments wearing this tank than any other singlet.<\/p>\n The singlet is constructed of an Italian-made open-mesh fabric that\u2019s tissue-thin and extremely breathable. Even on the hottest, most humid days, body heat escaped effortlessly, while the airy design allowed any breeze to pass through for cooling relief. The only drawback we found was that the fabric doesn\u2019t absorb moisture as well as thicker materials. However, its sheer lightness prevented this from becoming an issue.<\/p>\n Premium touches like laser-cut hems and bonded seams reduce the chances of chafing. The slim cut sits close to the skin and runs small, so if you prefer a more relaxed fit, we recommend sizing up. With many singlets, the shoulders and neck opening can shift while running, creating a distracting feel\u2014but not with the SOAR Race Vest 2.0. The shoulders lay flat and stay securely in place, ensuring a distraction-free run.<\/p>\n <\/p>\n <\/p>\n Sizing:<\/strong> XS-XXL Pros and Cons<\/strong> <\/section>\n The Patagonia Cap Cool Ultra checks all the boxes for a running shirt: comfortable, lightweight, fantastic at moisture wicking, and strikingly good looking. Of all the shirts I tested this season, this is the one I reached for the most, for everything from running to gym workouts to casual wear. It\u2019s made with an ultralightweight, 100 percent recycled textured-knit fabric that one tester said is \u201cso lightweight it disappears on the run.\u201d The thin fabric breathes well (scoring the highest of the group in our lab test), feels protective, and dries quickly. It\u2019s got a soft, silky touch without being fuzzy, and doesn\u2019t cling even when soaked.<\/p>\n The relaxed fit \u201cdrapes smoothly and doesn\u2019t look techie,\u201d noted a tester who found it to be a perfect casual shirt as well as an active one. Low-profile flat seams, gusseted arms, and a slight stretch in the material allowed for excellent mobility while running, and prevented any chaffing.<\/p>\n One tester, who is an avid traveller, called the Patagonia Cap Cool Ultra \u201cmy go-to all-purpose active shirt.\u201d With four aesthetically pleasing colorways, you can wear this strikingly good-looking shirt every day.<\/p>\n <\/p>\n Sizing:<\/strong> XXS-4XL Pros and Cons<\/strong> <\/section>\n One thing that becomes crystal clear when you test as many running shirts as we do is the stark difference between budget and premium-priced shirts in fit, comfort, wicking, and drying performance. Priced at $36, Adidas\u2019 ADI365 Climacool Iconic tee is the exception, performing like a shirt twice as expensive. The soft, single jersey fabric is made from recycled polyester, and, despite its medium weight, was one of the airier materials we tested.<\/p>\n Testers had mixed feelings about the large, baggy fit. Most praised it for giving the shirt a flowy feel and aiding air movement, while one found that once it got drenched, it felt heavy.<\/p>\n I regularly found myself reaching for this tee from among the many $70+ shirts nestled in my dresser. It lacks fancy treatments, a tailored cut, and bonded seams, but it just feels good. Another tester said, \u201cIt became a shirt I\u2019d constantly grab when I was going out on warmer days or later in the day when the sun was already high.\u201d<\/p>\n <\/p>\n Sizing:<\/strong> XS-XXL Pros and Cons<\/strong> <\/section>\n At nearly a third of the cost of other shirts, you will not find a higher quality running shirt at a better price. Crafted from 100 percent polyester with a woven grid pattern, it\u2019s lightweight, breathable, and comfortable. The woven design and thin fabric reminded me a lot of Patagonia\u2019s Capilene, and it scored similarly in the lab on air permeability and dry time but was less breathable.<\/p>\n Despite being called out as a trail tee, it\u2019s equally suitable for the roads. Throughout the warm, sunny SoCal summer, it kept me cool and comfortable, proving to be a versatile go-to for any run. After hot and sweaty workouts, I was impressed with how quickly the shirt dried in direct sunlight.<\/p>\n The fit is labeled as relaxed, but I found it slightly on the slim side compared to other shirts\u2014not enough to size up, but I wouldn\u2019t call it a true relaxed fit.<\/p>\n <\/p>\n Sizing:<\/strong> XS-XL Pros and Cons<\/strong> <\/section>\n Ciele spared no expense with the FSTTShirt 2. At 3.5 ounces, it\u2019s one of the lightest and airiest running shirts we tested. It\u2019s also one of the most expensive. The ultra-thin recycled polyester fabric is soft, silky, and feels weightless and invisible on the run. Open slits under the arms and down the sides have snaps to adjust the ventilation. One tester called it \u201cone of the best running shirts I\u2019ve worn in recent years,\u201d adding, \u201cI could race, long run, and do almost anything I wanted in this shirt.\u201d<\/p>\n The relaxed fit features a wider torso than other shirts tested, but drapes nicely off the shoulders. \u201cThe shirt fits great. Felt loose enough not to stick to me, and the material was great the whole run,\u201d one tester said. Premium touches like flatlock stitching, anti-odor treatment, and reflective details give the shirt a luxury feel.<\/p>\n <\/p>\n Sizing:<\/strong> S-XXL Pros and Cons<\/strong> <\/section>\n When it comes to wool apparel, Smartwool remains a trusted leader. The Active Ultralite Short Sleeve stands out as their highest-performing tee for high-output activities like running.<\/p>\n The running shirt is made with 53% Merino Wool and 47% Tencel Lyocell fiber, a blend that absorbs moisture faster and has higher thermal conductivity than merino alone. It also adds durability and is more eco-friendly. During testing, we can attest that the Active Ultralite Short Sleeve felt breezy and cool, and when sweat did start to drip for our pours, it absorbed it well.<\/p>\n The fabric\u2019s extremely light weight contributes to this being one of the more comfortable wool shirts we\u2019ve tested in hot and humid conditions\u2014and it scored the highest of the test group in air permeability. It does, however, require some extra care in laundering: one tester intentionally threw it in with other clothes all summer and noted some thinning spots after multiple washes.<\/p>\n The cut is athletic, designed to follow the natural lines of the body without being tight or clingy. \u201cThe fit was both the most comfortable and stylish of all the shirts I tested,\u201d said one tester. Another said he fell between sizes and chose to size up for a more relaxed fit, which he appreciated.<\/p>\n The shirt displayed all of wool\u2019s famed anti-odor properties. We had no problem getting multiple wears out of the Active Ultralite without the usual post-workout stench, which made this a go-to tee for travel as well as daily runs.<\/p>\n <\/p>\n Sizing: <\/strong>S-XXL Pros and Cons<\/strong> <\/section>\n The Cotopaxi Empaca Crew T-Shirt feels like that soft cotton tee you reach for hanging out. Tester after tester called out the running shirt for being \u201csuper soft\u201d and \u201cextremely comfortable.\u201d Recycled polyester and spandex are woven with Tencel fibers, which give the shirt a soft, natural-fiber feel, but with added moisture-wicking ability. Plus, it\u2019s biodegradable and uses far less water than cotton.<\/p>\n The shirt fits on the larger, more relaxed side, with a long hem. In terms of running performance, it\u2019s much heavier and holds sweat more than other options, but its strength lies in blurring the line between a soft active shirt and an around-town tee. \u201cThis is the only one I throw on just to work on the laptop or lounge around the house,\u201d noted one tester. Others said the Cotopaxi tee worked well for light runs that merged into coffee runs or watching kids\u2019 sports.<\/p>\n <\/p>\n Sizing:<\/strong> XS-XL Pros and Cons<\/strong> <\/section>\n The Flipbelt running shirt has everything you need and nothing you don\u2019t. Made with 100 percent polyester, one tester described it as \u201cthin, light, slightly stretchy, and highly breathable (particularly the perforated underarm panels).\u201d Its grid pattern lifts the fabric off the skin to increase airflow and reduce stickiness when soaked, and does so remarkably well.<\/p>\n Testers disagreed on the fit. I personally like a more relaxed, free-flowing fit, and the Flipbelt felt too close to the skin and restrictive in my normal size medium. However, one tester said the fit set the tee apart from the rest. \u201cThe long triangular gussets down the sides, from underarm to waist, and insets on top of the shoulders give it a 3-dimensional shape that stays close to my body without being tight, and allows unfettered mobility.\u201d The fitted shape was most appreciated when going fast, as it reduced any flapping and air resistance.<\/p>\n <\/p>\n Dressing for running is straightforward\u2014you want pieces that breathe, wick moisture, move naturally, don\u2019t stink, and don\u2019t get in the way. Shirt choices come down to how much skin coverage you prefer, fit, and material.<\/p>\n Here are some quick tips on buying the best running shirts without going broke:<\/p>\n <\/p>\n Given that we were testing during the winter, our testing was mostly done in Southern California. All testers are dedicated runners with average weekly mileage ranging from low 20s to mid-70s over both roads and trails. Some have been running for 30 or more years and can compare today\u2019s running apparel to previous attempts to keep runners cool in the summer. We focused on a subjective combination of moisture management, comfort, versatility, value, and looks to answer a simple question: Of all the apparel you logged summer miles in, which would you be most likely to recommend to fellow runners?<\/p>\n <\/p>\n \u00a0<\/p>\n Breathability deals specifically with the movement of moisture vapor through a material. Moisture is thicker and harder to move than air, which we measure with our air permeability test. To test breathability in the Outside Lab @ CU Denver<\/a>, we use a modified version of the standard ASTM \u201cUpright Cup Method,\u201d which works by sealing a section of fabric from the shirt over a bowl of water with a maintained temperature of 100-degree F. This temperature simulates human body temperature when working up a sweat, and is maintained with the use of a hot plate. Since the Outside Lab is located in Denver, the air is generally dry and holds a relatively low humidity level (approximately 35 percent) to help draw out moisture during testing. Breathability, or moisture vapor transmission, is recorded by measuring the combined weight of the sample and water dish over time. The more weight lost during the test, the better the breathability. Running shirts are given a score of 1 to 5, least to most breathable.<\/p>\n For shirts using different materials in specific zones, such as vented back or side panels, each section was tested. The weight of each shirt by itself was also taken at the start and end of the test. This shows how much moisture became trapped in the material during testing, which can affect breathability. The weight gain, if any, is used when scoring each shirt\u2014more moisture trapped in the fabric results in a slight downgrade in score.<\/p>\n It\u2019s important to note that our test in the Outside Lab only accounts for the fabric itself, not taking into consideration the fit, which, combined with air permeability, can affect how a shirt feels on a run. Lab data is important, but it\u2019s best to combine it with the results from field testing for a more complete view of the product.<\/p>\n Air permeability is a measure of how much air (in volume) is able to move through a fabric. It is not the same as breathability, which measures how moisture vapor (sweat) moves through a fabric. The more air permeable, the more the cooling breeze makes it through your shirt and reaches your skin directly. To test this in the Outside Lab @ CU Denver<\/a>, we use a James Heal AirPro, a machine that uses a vacuum pump to pull air through fabric clamped between plates with a specific-diameter opening to measure the flow rate at a pre-set pressure. The greater the volume of air getting through, the more air permeable the fabric is. This lab test only evaluates the material itself, and can\u2019t account for how the cut and design of a garment aids its airiness.<\/p>\n The lab tested drying time by soaking each shirt and then recording how long each needed to dry. Each shirt was weighed while dry, then soaked in tap water until all of the material had absorbed water. After soaking, they were hand wrung until all excess water stopped releasing from the fabric, leaving a fully saturated, but not soaked, shirt. The saturated shirts were weighed again to get the \u201cwet\u201d starting point and then put on a mannequin to dry. Weight was recorded every hour to start and then every 15 minutes as they approached dryness, stopping when the sample was within 4 percent of the original dry value. Allowing for 4 percent of weight gain (a few grams) takes into account any dirt particles that could be introduced from the tap water or environment, and small hemmed areas of the shirt that may hold a little moisture, even though the overwhelming majority of the shirt is dry.<\/p>\n <\/p>\n Cory Smith, a former Division One runner at Villanova University, and founder and running coach of Run Your Personal Best<\/a>. He has been running since the mid-1990s. With over a decade of experience testing and reviewing running apparel and shoes for publications like Outside and Runner\u2019s World, he continues to compete as a masters athlete, boasting a personal best of 4:31 in the mile. He consistently logs 30 to 40 miles per week over roads, trails, and on the track.<\/p>\n A 13.25km trail race Cory Smith ran while testing the Adidas Adizero Running Singlet. <\/em>(Gaia GPS is owned by Outside Inc.)<\/em><\/p>\nBest Running Shirts: At a Glance\u00a0\u00a0<\/b><\/h2>\n
Singlets<\/strong><\/h3>\n
T-Shirts<\/strong><\/h3>\n
Best Running Singlets<\/b><\/h2>\n
![\"Adidas](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2025\/05\/Adizero-Running-Singlet_h.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Running Tank Top Overall<\/strong><\/h2>\n
Adidas Adizero Running Singlet<\/strong><\/h3>\n
Lab Breathability:<\/strong> 3 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 1
Lab Dry Time:<\/strong> 5<\/p>\n
+ Silky smooth feeling
+ Superb mobility
\u2013 Saturates with moisture easily<\/p>\n![\"Ciele](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/CieleTank_1.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Runner-up, Best Running Tank Top Overall<\/strong><\/h2>\n
Ciele ICNSinglet<\/strong><\/h3>\n
Lab Breathability:<\/strong> 4 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 5
Lab Dry Time:<\/strong> 4<\/p>\n
+ Extremely lightweight
+ Airy, barely-there feel
\u2013 Expensive for a singlet
\u2013 Torso fit is baggy<\/p>\n![\"SOAR](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2025\/05\/SOAR-Race-Vest_h.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Running Singlet for Race Day<\/strong><\/h2>\n
SOAR Race Vest<\/strong><\/h3>\n
Lab Breathability:<\/strong> 4 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 4
Lab Dry Time:<\/strong> 5<\/p>\n
+ Extremely breathable, perfect for hot, humid conditions.
+ Featherweight design
\u2013 Runs small<\/p>\nBest Running Shirts<\/b><\/h2>\n
![\"Outside](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/Outside-Lab-Running-Shirts.png?width=3840&auto=webp&quality=75&fit=cover\"\/)
![\"Patagonia](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/Patagonia_1.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Running Shirt Overall<\/strong><\/h2>\n
Patagonia Capilene Cool Ultra<\/strong><\/h3>\n
Lab Breathability:<\/strong> 5 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 4
Lab Dry Time:<\/strong> 4<\/p>\n
+ Lightweight, silky fabric
+ Nice enough to wear casually
+ Odor control
\u2013 Hem sits fairly high on the waist<\/p>\n![\"Adidas](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/Adidas_1.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Runner-up, Best Running Shirt Overall<\/strong><\/h2>\n
Adidas ADI365 Climacool Iconic Tee<\/strong><\/h3>\n
Lab Breathability:<\/strong> 4 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 3
Lab Dry Time:<\/strong> 4<\/p>\n
+ Outstanding performance-to-price ratio
+ Excellent moisture management
+ Comes in seven colors
\u2013 Some found it too baggy<\/p>\n![\"Terignoga](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2025\/05\/Terignoga-Trail-Tee_h.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Value Running Shirt\u00a0<\/strong><\/h2>\n
Terignota Trail Tee<\/strong><\/h3>\n
Lab Breathability:<\/strong> 2 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 4
Lab Dry Time:<\/strong> 4<\/p>\n
+ Extremely lightweight
+ Outstanding price-to-performance
\u2013 Limited color options<\/p>\n![\"Ciele](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/Ciele_1.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Splurge Running Shirt<\/strong><\/h2>\n
Ciele FSTTShirt 2<\/strong><\/h3>\n
Lab Breathability:<\/strong> 4 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 4
Lab Dry Time:<\/strong> 4<\/p>\n
+ Highly breathable and airy
+ Practically weightless
\u2013 Wide fit around the torso<\/p>\n![\"Smartwool](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2025\/09\/Smartwool-Active-Ultralite-Short-Sleeve.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Wool Running Shirt<\/strong><\/h2>\n
Smartwool Active Ultralite Short Sleeve<\/strong><\/h3>\n
Lab Breathability:<\/strong> 3 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 5
Lab Dry Time:<\/strong> 3<\/p>\n
+ Fabric is thin and highly breathable
+ Wicks and dries moisture exceptionally well
+ Soft, natural feel against the skin
\u2013 Delicate care is required<\/p>\n![\"Cotopaxi](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/5P5A1429.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Most Comfortable Running Shirt<\/strong><\/h2>\n
Cotopaxi Empaca Crew T-Shirt<\/strong><\/h3>\n
Lab Breathability:<\/strong> 3 (1=worst; 5=best)
Lab Air Permeability:<\/strong> 2
Lab Dry Time:<\/strong> 3<\/p>\n
+ Extremely soft to the touch
+ Versatile as an everyday tee
\u2013 Retains moisture more than pure polyester tees<\/p>\n![\"Flipbelt](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2026\/05\/5P5A1415.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
Best Running Shirt for Racing<\/strong><\/h2>\n
Flipbelt Running Shirt<\/strong><\/h3>\n
Lab Breathability:<\/strong> 3 (1=worst; 5=best)
Lab Air Permeability: <\/strong>3
Lab Dry Time:<\/strong> 4<\/p>\n
+ Highly breathable
+ Vented perforations under the arms
+ Fitted style stays close to body
\u2013 Looks and fits like a technical running shirt<\/p>\nWhat to Look For in Running Shirts<\/strong><\/h2>\n
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![\"testing](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2025\/05\/testing-running-shirts_h.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
How We Test Running Shirts<\/strong><\/h2>\n
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![\"lab](\"https:\/\/cdn.outsideonline.com\/wp-content\/uploads\/2025\/05\/lab-testing-shirts_h.jpg?width=3840&auto=webp&quality=75&fit=cover\"\/)
How We Tested Running Shirts in the Outside Lab<\/strong><\/h2>\n
Breathability (New test in 2026)<\/b><\/h3>\n
Air Permeability<\/b><\/h3>\n
Dry Time<\/b><\/h3>\n
Meet Our Lead Testers<\/strong><\/h2>\n
Cory Smith\u00a0<\/strong><\/h3>\n