Women's Nike Power Speed Running Tight - TUNED SUPPORT. The innovative design of Women's Nike Power Speed Running Tight locks down muscles in key zones for maximum support and mobility. Nike Power fabric provides stretch and support. Screen-printed graphic provides engineered support. Zippered pocket with a vapor barrier keeps small items dry and secure. Drawcord is encased in a low-profile waistband for a comfortable, personalized fit. Utilizes an innovative graphic inspired by the lane lines on a track. It is strategically applied along the IT band and across key muscles for support and a compressive feel while running. Body : Dri-FIT ii. 260g. 74% polyester 26% spandex warp knit mesh. mm mechanism capillary action, low length modulus, low width modulus, embossed pocket membrane 130g. 100% polyester composite material assembly. wr pfc c6 gusset liner Dri-FIT iii. 90g. 100% polyester (100% recycled) crepe. mm mechanism capillary actiongusset liner Dri-FIT 90g. 100% polyester (100% recycled) crepe.