The Best Underwear for Women Who Work Out Hard

Four-way stretch keeps you comfy while you move, while Lululemon’s Nakedseam technology (yep, this exists!) reduces chafe on long runs. Plus, the lightweight fabric is moisture-wicking to keep you cool and dry—no more down-there sweat problems. ($18; shop.lululemon.com) (Can Underwear Make or Break Your Workout? We asked all the questions you're not asking (but want to!).)

Long yoga classes are great. But moving around in not-so-dry underwear? Not so much. Meet this soft and lightweight thong—it has a wide waistband to keep you comfortable and BodyFree antimicrobial technology, which fights odor-causing bacteria. So you'll be able to move around as much as you need, and you won't have to worry about issues below the belt. ($15; caliastudio.com)

Knixwear is serious when it comes to making undies! For this pair, the company surveyed over 350 female personal trainers to make sure they designed a product that stood up to even the toughest workouts. The result? The FitKnix Air Athletic Boyshorts with a seamless finish that's invisible under workout clothes. ($23; knixwear.com)

Eco-conscious gym-goers, rejoice! These briefs are made from recycled fabric, have moisture-wicking properties, and lie flat to fight rolling, binding, and chafing. And the crotch is made with mini-ribbed fabric to keep air flowing freely so you stay dry. ($22; patagonia.com)

Made from bamboo, tasc’s fabrics are all natural—and moisture-wicking, anti-odor, and temperature-regulating, to boot. The fabric is so soft and lightweight, you’ll barely notice it at all. We promise. ($14; tascperformance.com) (Their Bambooty panties were also featured in our Sustainable Fitness Gear for an Eco-Friendly Workout.)

When you’re on a multi-day active adventure, these undies are your go-to. They can be easily washed in a sink (seriously!) and they air-dry quickly. And whether you’re camping or just working out locally, the ultralight mesh will keep you dry, and the sweat-, odor-, and stain-resistant fabric will keep you clean and fresh—no matter how dirty the great outdoors gets. ($22; exofficio.com)

These seamless bikinis are invisible under clothes, and the gathered back helps them hug your body—so they stay put while you’re working out. Plus, who doesn't love that little style detail? ($20; lolewomen.com)

The breathable, dye-free liner on this thong dries quickly, protecting your clothing from excess moisture. And you'll be hard-pressed to find a panty line—even with the tightest of yoga pants. ($17; knockoutpanties.com)

These “one-size-fits-most” undies give you more coverage than a thong but less than a brief, keeping you comfy, supported, and sans lines back there. And the soft, stretchy fabric will make these a favorite for workouts and everyday wear alike. ($12; underarmour.com)

As the name promises, the lack of seams on these briefs means they won’t show up under your workout pants—even if you're crunching yourself into a pretzel in yoga. Super-stretchy and low-rise, they’ll stay comfortable through even the most active workouts. ($20; sweatybetty.com)

Thanks to technical wicking fabric and free-cut leg openings, these soft panties won’t irritate you. Plus, the antimicrobial finish will keep you odor-free during long workouts that never. Seem. To. End. ($8; movingcomfort.com)