The newest Hi-Tec's S750 4:SYS indoor brings back the 4:SYS approach of the 2009-10 model year, with improved wearability, fit, and styling. This model give you grip, cushioning, control and support. Upper: High abrasion Abrazone across the toe box provides increased durability right where you need it most. Straps integrated into the lacing system wrap around the midfoot and around the back of the heel for unsurpassed support that is essential for making quick cuts on the court. Durable synthetic PU upper with mesh ventilation provides durable breathability. A gusseted air-mesh tongue provides additional stability and aides in ventilation keeping your feet cooler. Anti-bacterial lining prevents the growth of odor causing bacteria. Non-slip heel linings further increase stability. Midsole: Hi-Tec's Impact Zone provides cushioning in the rear of the heel where you really need it. The impact forces experienced during a game are huge and the contact angles during a lunge, compared to running, are also extreme. Combined, these angles focus huge forces through the back rear of the heel. Hi-Tec's Impact Zone compound has been uniquely developed to deal with these forces in this specific location, tested with up to 38% more shock absorption. 4:SYS technology provides dynamic motion control for your feet. By reducing the transfer of energy from heel strike to when the shot is played the potential for injury is drastically lowered. 4:SYS technology delivers more support, stability and control by increasing the time from heel contact to shot. This in turn reduces the transfer of energy during your footstrike. Adopting 5 different densities in 7 locations, 4:SYS delivers more control and stability by not isolating pressure zones into two areas (forefoot and heel) like some traditional shoes. Dynamic fit last designed specifically for indoor squash courts. Removable molded EVA sockliner increases cushioning and comfort. Outsole: Peak Force provides the maximum grip at the moment you play your shot because of increased surface contact that provides up to 6 times more grip for better stability with improved force and pressure distribution. Non-marking outsole. Ready for immediate shipment.