Fully Breathable One-Piece Upper (90% Polyester, 10% Spandex) Athletic and Stable Fit Forms to Your Foot Shape One-Piece TRUEknit Upper Flexibly Conforms to Most Foot Shapes Full Sock Fit Flexible Opening for Slide-In Comfort All Day V2 Sole Anti-rub Heel Pad for Comfort right out of the box Microsuede Heel Overlay for Added Stability New Open Cell Antimicrobial Insert for Increased Breathability and Comfort Wanderlux® Midsole for Increased Comfort and Rebound TOUR Tested & Approved Extremely Lightweight - 9.1 oz. Cross-Life Tread for Maximum Versatility and Grip Transitional Drop (~6-8 mm) Machine Washable DWR Treated Upper