Salomon Men's RX Gecko Cross-country Shoe 100% Synthetic and mesh Rubber sole Contagrip Outsole with OS Tendon Injected EVA Midsole with OS Muscle Quick-drying, anti-debris mesh Quicklace System with easy-entry upper elastics Protective synthetic toe cap and lace pocket Heavy-duty lugs create traction on the trails, while a lightweight design keeps feet moving fast.