The K-Swiss Tubes with the patented Tube system keeps you on the run all-day long. Get ready for unmatched comfort while you work on your body and prepare for the games with these kicks featuring a CMEVA midsole. Lightweight and flexible, these shoes help you get on your stride and give you a running experience like never before. K-Swiss Tubes features: Textile upper brings solidity and durability. Textile collar lining adds to the strength. CMEVA midsole gives undeniable comfort. Lace closure keeps you locked-in. Rubber outsole offers unlimited traction.