ASICS Men's GEL-Dirt Dog 3 Track & Field Shoe 100% Synthetic Rubber sole Solyte midsole material is lighter than ASICS' standard EVA and SpEVA, combined with improved cushioning and durability Integrated Lacing System wraps the upper snugly and comfortably around the foot Solyte midsole material is lighter than ASICS' standard EVA and SpEVA, combined with improved cushioning and durability Rearfoot GEL Cushioning System provides shock attenuation in the heel 6 Spike Configuration conforms to the perimeter of the outsole to provide traction regardless of terrain