NIKE Women's Dri-Fit Hyper Power Speed Running Tights Compression fit provides a high level of support across key muscles, for exceptional mobility. High-stretch Dri-FIT fabric helps you stay dry, comfortable, and on the move. The zip pocket on the center-back has a vapor barrier to help protect stored items. Low-profile waistband and drawcord for a secure, comfortable fit. Reflective details enhance visibility in low light. Fabric: Body: Dri-FIT 74% polyester/26% spandex. Pocket: 100% polyester. Gusset lining: Dri-FIT 100% recycled polyester.