Terramar Full Leg Performance 2.0 Midweight Leggings - Women39;s synthetic Constructed of 90% micro nylon, 10% spandex fabric. Nylon stretch construction with ec2 Qwik-Dri Thermoregulation for warmth and moisture control. Soft, comfortable waistband that won't dig in. All-over body-shaping with extra tummy control. Cotton crotch panel.