This is the underwear you've been dreaming about. Seamless, soft on the skin, and exponentially better than cotton, the Balance Briefs are the pinnacle of comfort and function. Made from Merino wool with a touch of spandex and cut for an active woman, they won't ride up, chafe, pinch, or squeeze. Go ahead and treat yourself; this is a splurge you can justify. Merino seamless active brief. Form Fit. Body mapping for comfort & breathability. 72% Wool, 22% Nylon, 6% Spandex. Weight: .08.