Under Armour O-Series Seamless Thong Underwear - Women's - $17.95

If you're a sporty girl, the chances are you have limited patience for the scraps that try to pass as underwear and end up bunching, shifting, or just plain falling apart. The Under Armour Women's Seamless Thong Underwear packs a lot of comfort into a tiny thong design, with a wicking, ultra-stretchy fabric, an extra-wide waistband, and seamless, abrasion-free construction. So whether you're dressing for a workout or for a night on the town, you're getting a thong that offers the kind of performance you demand from your gear. - $17.95