In this updated version of ASICS Gel-Resolution 6 tennis shoes, the new design sees the removal of the plastic clutch in the heel to reduce weight and allow for more flexibility. Players will appreciate that this update maintains the stability and cushion of previous versions. This low-profile design will really keep you connected to the court.Upper: Flexion Fit® propriety upper provides form-fitting comfort without sacrificing support. Padded tongue and heel collar enhance comfort. Lace-up front offers an adjustable fit. Mesh provides breathable flexibility.Midsole: DuoMax® dual density midsole support system is positioned to enhance support and stability. Rearfoot and forefoot GEL® cushioning systems attenuate shock during impact. Solyte® midsole material is a lighter weight midsole compound than ASICS' standard EVA or SpEVA®. Midfoot Trusstic System reduces the weight of the sole unit while retaining the structural integrity of the shoe. Impact Guidance System (I.G.S®) design philosophy employs linked componentry to enhance the foot's natural gait. OrthoLite sockliner provides additional cushioning and an anti-bacterial treatment to reduce odor. Outsole: Non-marking outsole. AHAR® (ASICS High Abrasion Rubber) is placed in critical areas of the outsole for exceptional durability.