Prince NFS Assault indoor, squash, racquetball shoes are low-to-the-ground for incredible stability and performance on indoor court surfaces. The NFS™ Natural Foot Shape last follows the natural shape of the foot for optimal comfort and performance. Durability features allow them to keep up with your game and last longer.Upper: Lightweight, synthetic upper with mesh panels offer comfort and added breathability. Padded tongue and heel collar enhance comfort. Duraskin II toe cap provides toe drag protection during aggressive play. Flat laces reduce irritation and pressure points. Midsole: TPU Arch Bridge delivers great lateral support and stability. Full-length compression molded EVA offers lightweight cushioning and support. Mesh lining provides a smoother fit. Removable insole. Outsole: Gum rubber outsole delivers superior traction and durability.