The EXo shoecovers are made from from-fitting Lycra, with minimal seams to improve aerodynamics. A cleat cutout lets them work smoothly with your cycling shoes, and zipper closure makes them easy to put on and take off. Features: - EXO Lycra Shoecovers are created with only one seam along the bottom of your cycling shoe to hide it from the wind. - The top seam is eliminated to improve aerodynamics. - Zipper Closure - Cleat cutout - Sizing: Small (37-38),Medium (39-41),Large (42-44), XLarge (45-47)