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Summer running is difficult enough with the challenges of heat and humidity. The last thing you need is to be held back by running shorts that bunch, cling, chafe, or restrict your movement. The perfect running shorts should be so comfortable that you hardly notice them, while looking so good that others do. We tested over 40 pairs in the most sweltering conditions to find the best running shorts for you, whatever your style.

(Photo: Courtesy Black Diamond)

Best for Trail Running

Black Diamond Distance Short

Sizing: XS-3XL

Pros and Cons
⊕ Outstanding pockets
⊕ Water- and wind-resistant shell
⊕ Available in 5” and 7” inseam
⊗ Short drawstring can be difficult to tie
⊗ Could use a little more stretch

“The Black Diamond Distance shorts get everything right,” one tester remarked. The pockets are the first thing that stood out. With four drop-in pockets and one large rear zippered pocket, these shorts impressed us with their copious, efficient carrying capacity while maintaining a comfortable fit suitable for the longest mountain days. We were able to easily carry an iPhone, enough fuel for a few hours, and an emergency shell without any discomfort.

Offered in five- and seven-inch inseams, the durable shell with a PFC-Free DWR sheds light moisture and resists snags and tears from bushwhacking and tumbles. Combined with a comfortable and supportive mesh brief liner, the tough exterior offered excellent protection against wet, chilly ridge winds when running in the high mountains.

One small quibble: a tester said he’d prefer a longer drawstring with a little bit of stretch to get a more secure fit around the waist when the pockets were loaded down.

Best 2-in-1

Ciele M DLYShort 5″ Long Brief

Sizing: XS-XXL

Pros and Cons
⊕ Incredibly soft and supportive liner
⊕ Available in long or short liner
⊗ Phone bounces in pocket

Ciele is best known for its performance running hats, but the brand nailed it with the DLYShort 5″. “These shorts feel deluxe!” raved one tester.

The internal nylon and elastane liner is one of the softest and most comfortable we tested, offering excellent support and staying perfectly in place throughout the run. Even when drenched in sweat, it remained irritation-free. The shell is a lightweight, stretchy, recycled, woven fabric with a PFC-free DWR treatment. However, it feels much softer than other DWR-treated fabrics we tested. One tester called the short’s overall feel “out-of-this-world nice,” while another praised its classy looks: “I’ve gotten more compliments on group runs for these shorts than anything else in my running wardrobe.”

The shorts offer three pockets, a rear zipper, a small internal stash pocket, and one integrated into the liner. While we could fit a phone in the rear pocket, it unfortunately bounced around quite a bit, and we found it best to reserve the pockets for smaller, lightweight items.

If you’re a fan of 2-in-1 shorts, these are well worth the investment. And if you’re not a fan of the long liner that extends past the 5-inch inseam of the shell, Ciele offers an option with a shorter one.

Best Half Tights

Adidas Adizero Control Running Short Leggings

Sizing: XS-2XL

Pros and Cons
⊕ Supportive fit
⊕ High-quality material
⊗ Thick fabric can run hot

There’s something uniquely satisfying about the feel of snug, supportive tights hugging your muscles. The Adidas Adizero Control Running Short Leggings, crafted from a relatively thick blend of 83 percent polyester and 17 percent elastane, delivers mild compression to your quads, glutes, and hamstrings, ensuring they stay engaged and protected during even the most intense runs.

Flexible, rubber-like (TPE) strips stretch across the major muscles to add additional support. The result is a tighter, more supportive fit than the other tights in this test. However, although you might expect them to feel restrictive, the material is surprisingly stretchy and flexible, allowing full range of motion. The downside is that they can feel too warm in hot conditions. But that was one of our few complaints about these tights that otherwise made us feel fast and powerful.

What to Look For in Running Shorts

Running shorts vary in length, liners, pockets, fit, and fabric. You’ll want a length that is short enough for full, unimpeded motion (the faster the run, the shorter and more split the shorts tend to be), but long enough to feel decent on the trail, road, or post-run coffee shop.

Liners range from soft, loose briefs to compression-shorts-like stretchy boxers—or none at all for those who prefer to wear their own underwear. Choosing between liners is a matter of personal taste, balancing breathability and range of motion with level of coverage and control.

Pockets need to be big and secure enough for whatever you want to carry: phone, keys, cards, gels. And pocket placement location is important to allow convenient access and avoid bouncing and chafing, as is the robustness of the waistband to prevent sagging when carrying anything heavy, like a phone.

When it comes to fit and fabric, as with all summer running gear, you want pieces that breathe, wick moisture, move naturally, delay stink, and don’t get in the way.

Here are some quick tips on buying the best summer gear without going broke:

• Look for high-quality synthetic fibers. Yes, our top picks include a few items with natural fibers. But for the most part, specially designed varieties of polyester, polyamide, nylon, and the like can handle summer running’s high sweat rates better than wool and cotton.
• Seek sun protection. Even if you run at dawn or dusk, or on shaded trails, sun damage can be insidious. Many shorts and tops come with a UPF coating. Running tan lines aren’t something to be proud of.
• Check for chafing. If you’ve ever been rubbed raw by a rigid seam or sagging liner, you won’t want to repeat the experience. Abrasion accelerates when you’re drenched in sweat. Look for flat seams, unobtrusive logos, and other elements of construction that will minimize chafing.
• Go with the flow. Our picks in this review strike the right balance between being loose enough to allow cooling air flow but not so billowy that they impede normal running form.
• Banish bacteria. Many summer running items incorporate an anti-bacterial treatment that greatly reduces nasty odors setting up shop. These pieces not only can be worn many more times before needing to be washed, but also lessen your chance of developing a funky skin situation.
• Invest in quality. It can be tempting to think, “Whatever I run in is going to get soaked anyway, so I’ll just buy the cheapest gear out there.” Such reasoning quickly falls apart when, well, the item itself starts to fall apart because of constant exposure to sweat and frequent laundering. Fewer high-quality pieces that hold their form and don’t hold odors are better than more cheaply made gear that will start disintegrating in one summer.

How We Test

• Number of testers: 10
• Number of shorts tested: 40+
• Number of miles run in testing: 4,500+
• Highest testing temperature: 97 Fahrenheit

Our testing team ranged across the U.S.—from coastal Maine and western Maryland to central Wisconsin, the high plains of Nebraska, the urban bake sites of Chicago and Houston, and out to Santa Barbara on the California coast, plus, for good measure, the running hub of Eugene, Oregon. All are dedicated runners with average weekly mileage ranging from low 20s to mid 70s. Some have been running for 30 or more years and can compare today’s 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?

Meet Our Lead Testers

Cory Smith

Cory Smith, a former Division One runner at Villanova University, has been running since the mid-1990s. With over a decade of experience testing and reviewing running apparel and shoes for publications like �����ԹϺ��� and Runner’s 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.

A 13.25km trail race Cory Smith ran while testing running shorts. (Gaia GPS is owned by �����ԹϺ��� Inc.)

Scott Douglas

Scott Douglas says he’s run more than 130,000 miles since starting as a teen in the 1970s, and has always loved how daily runs undergird and elevate the rest of his life. and a writer/editor about fitness, he sweats like crazy despite living in Maine.