HEAD Nitro Pro Indoor squash and racquetball shoes are designed with materials in the forefoot and the heel that provide a responsive feel. Players will love the quick rebound and smooth transitions from shot to shot. A breathable mesh upper and the HEAD Cooling System™ allows for a cool, comfortable environment during hours of on-court play. Upper: One-piece breathable vamp and tongue mesh offer breathable flexibility. Anti-stretch TPU skin provides additional lateral support. 180° Drift Defense features rubber toe cap and medial protection. Built with breathable and lightweight EVA tongue construction. Features a TPU heel collar for stability. Lightweight TPU skin welded on breathable mesh. Integrated lace frame wraps around the foot and provides more personalized fit. Midsole: TRI-NRG technology provides exceptional cushion and energy transfer. Lightweight EVA sockliner with midfoot HEAD Cooling System™. Neutralize shock-absorbing heel EVA. Outsole: Built with lateral stability trigger TPU enhanced. Non-marking rubber gum outsole provides traction for indoor court surfaces.