A revolutionary technology that's sure to change your approach to running. The Tubes Run 100 from K-SWISS provides an amazing responsive heel-to-toe transition. Features full-length cylinders for excellent flexibility, support and stability. Combination breathable mesh upper with synthetic overlays. Padded collar with achilles heel notch for added mobility. Stay-tied laces act as a catch to keep laces firmly tied. Textile lining with removable, molded-EVA sockliner. Cushioning is achieved with correctly-engineered cylinders offering controlled shock dispersion. A smaller, anatomically-placed cylinder on the medial side offers great stability. A K-EVA midsole provides maximized cushioning and enhanced durability. Support is obtained with mid-foot support construction that hugs the center of the foot. Flexibility is enhanced by anatomically correct flex-grooves. Aösta II rubber compound provides unsurpassed durability from heel-to-toe. Measurements: ; Weight: 10 oz ; Product measurements were taken using size 6, width B - Medium. Please note that measurements may vary by size.