TRUEknit Fully Breathable One-Piece Upper (90% Polyester, 10% Spandex) | One-Piece TRUEknit Upper Flexibly Conforms to Most Foot Shapes (D-EE) | New Open Cell Footbed for Increased Breathability and Comfort on Warmer Days | Cross-Life Tread for Maximum Versatility Transitional Drop (~6 mm) | Disclaimer: The sizing for this style will be 1/2 size smaller than regular sizes