Every product is independently selected by (obsessive) editors. Things you buy through our links may earn New York a commission. 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 ...