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What’s the Best Workout Underwear for Women?

Photo: Herbert Gehr/The LIFE Picture Collection/Gett

When I reached out to fitness-fanatic friends to talk underwear for this story, the most common response was something like, “Ugh, I can’t find workout underwear that doesn’t suck.” Surprisingly, even these women who spend hours repping it out at the barre, turning up the resistance on the bike, and clocking miles on the treadmill struggle to find underwear that stays in place, isn’t visible under leggings, and wicks moisture away to keep intense workouts from feeling, well, swampy.

To find the best underwear for various types of exercise, I asked fitness instructors, studio owners, and experienced exercisers to share their Holy Grail underwear picks with the rest of us. Here’s a roundup of the thongs, bikinis, hipsters, and briefs that got rave reviews, and similar pairs that meet the experts’ strict requirements.

Through all that lifting and tucking, barre classes devote a lot of attention to sculpting a strong butt — attention that shouldn’t be stolen by visible panty lines. Physique 57 instructor Morgan Bontz loves teaching class in these seamless thongs that “lay flat” under leggings and “don’t bunch up or show texture like lace thongs.”

Bontz’s other go-to is this thong style from Commando — a Strat-favorite brand. It’s lightweight and breathable enough to handle a full slate of sweaty classes. The “great nude shades” are invisible under even her lightest-color pants, a good option if your workout-leggings wardrobe extends beyond basic black.

For even more varied skin-toned options, ThirdLove offers five different “naked” shades in their seamless thongs and other underwear, as well as fun colors like teal and seafoam. With a laser-cut hem, this thong will definitely go unnoticed.

Photo: 18-02-15 zainagohou PM1 B9 kateb

Kaitlin Vandura, owner of several New York Pure Barre studios, prefers the “comfortable, breathable, and cute” thongs from Hanky Panky (also a favorite of Shark Tank’s Barbara Corcoran), which come in a rainbow of bright colors and are one of the few lacy varieties that stay hidden under clothing.

These hipsters from Spanx have a full-lace backside if you love lace but want more coverage than a thong. Like all Spanx pieces, they create a smooth, even shape without making themselves known through your clothes.

When you’re on all-fours doing donkey kicks with a taut pulley attached to your ankle, there’s nowhere for panty lines to hide. Amanda Freeman, founder and CEO of SLT, says that these sleek Cosabella G-strings are the “only way to ensure that your neighbor and instructor won’t catch a glimpse of your undies mid-class.”

Boody Classic Bikini
From $12

Aditi Shah, director of the 200-hour teacher-training program at Yoga Vida and co-creator of Mindful Morning, looks for brands “that are organic or have a sustainable mission” and are still invisible under tight-fitting yoga pants. She said the “very comfortable ecofriendly options” from Boody are a favorite among yoga instructors, since they’re both seamless and made from sustainable bamboo.