Taken from Sierra.com... "Overview "...Pound out the miles in comfort with Saucony's Endorphin Shift 3 running shoes, crafted in breathable mesh with foot-hugging FORMFIT design, PWRRUN cushioning propulsive SPEEDROLL technology to help keep you going. Snug-fitting breathable mesh upper with synthetic overlays for added structure and support Lace-up front Padded tongue and collar Breathable mesh lining Deeper FORMFIT design hugs every part of your foot for a more personalized fit and feel Streamlined heel clip hugs and supports your foot PWRRUN+ removable cushioned footbed SPEEDROLL technology propels you forward to run faster, not harder Taller PWRRUN cushioned midsole is lightweight, responsive and cushions each step Torsional heel grooves for smoother heel to forefoot transitions EVA and XT-900 rubber outsole for traction and durability Imported Specs Upper: Mesh and TPU Lining: Textile Removable insole Outsole: EVA (Ethylene Vinyl Acetate) and rubber Imported" Item# S20802-01 *new and never worn without tags/ box