ASICS GEL-SOLUTION SLAM Women's Tennis Shoes Rear and Forefoot Gel - ASICS trademark cushioning system which absorbs impact force superbly, dampening shock in the initial heelstrike and allowing for a smooth transition through the step, greatly increasing comfort and performance and reducing the risk of injury. Trusstic System - Under the arch is a plastic component which gives the shoe great strength and enhances flexibility and stability. SpEVA midsole - Provides optimum bounce-back and durability. AHAR+ - A thinner and lighter version of ASICS High Abrasion Rubber. It is placed on heavy contact areas of the outsole to reduce excessive wear. Non-Marking Rubber Outsole - Very grippy rubber which is non-marking, so it is suitabe for indoor use.