Arc'teryx Cita 3/4 Tight - Women's Altavela stretchPolyester/Spandex blend. A single knit polyester jersey fabric with high performance stretch Aeris88% polyester, 12% spandex 132 g/. Stretchy, tight-gridded mesh textile Smooth finish, stretch fabric provides comfort, next-to-skin fit and full mobility Gusseted crotch for ease of stride Just-below-knee length provides coverage for cooler days Hem at knee is longer in front to provide more coverage while cut away at back of knee reduces bulk Lower lumbar zipper security pocket with media port has semi auto-locking zipper slider