Champion Women's Marathon Legging Fabric Content: Body: 88% nylon/12% spandex; Mesh Inserts & Crotch Liner: 90% polyester/10% spandex. Stretches with ease so you can go the distance. Mesh insets below the knee add air flow. No-chafe, bonded seams feel great next to skin. 360 degree reflectivity for visibility. Back stash pocket with locking zipper.