Giro Carbide Bike Shoe - Men's Leather UPPER : High-quality, breathable synthetic fiber. Classic 3-strap closure OUTSOLE : Injected nylon High traction lugged outsole Mid-foot scuff guard Accommodates steel toe spikes FOOTBED : Molded EVA footbed with medium arch support. Aegis anti-microbial treatment WEIGHT : 325 grams (size 42)