Fit & Design Increased foot coverage for in-sneaker comfort Internal gripper at heel to secure sock fit Women's specific fit; narrower heel and slimmer fit 4 Degree(TM) Elite Fit System for a dialed, performance-oriented fit with flex zone at ankle joint Virtually Seamless(TM) toe for enhanced comfort Non-cushioned for maximum performance in close-fitting shoes Shred shield(TM) helps reduce wear from toes