Pearl iZUMi Women's W X-ALP Drift IV-W Cycling Shoe 100% Upper: 60% Rubber/38% Textile/2% Steel Ring; Sole: 40% Rubber/35% Ethylene Vinyl Acetate/23% Nylon Plastic/2% Steel Imported Synthetic sole Quick lacing closure system gives secure foot in all conditions ; SPD compatible ; Sole Material: Rubber Barefoot construction for a comfortable fit with or without socks Fiberglass injected composite plate for efficient power transfer Highly breathable mesh/synthetic upper delivers comfort and breathability, Ethylene vinyl acetate foam run shoe midsole for off the bike cushioning and comfort Carbon rubber lugged outsole for superior traction and durability,