Tecnica Men's Viper II Low Trail Runner 100% Synthetic and mesh Rubber sole Oversized rolling zone provides progressive + uniform energy transfer and eliminates dead spots Tecnigrip is premium rubber composite material combined with rolling spine and rolling profile that provides maximum grip by ensuring maximum surface area in ground contact and uniform pressure distribution Ortholite footbeds provide superior cushioning with step-in dynamic comfort durability and anti-microbial T Cube Cushioning is triple density composite cushioning optimizes performance Lateral Catamaran is low profile cradle integrated with outsole to provide maximum dynamic + lateral stability