Designed with an infusion of performance tennis DNA the K-SWISS Tubes Sport Ultra features a new lightweight and breathable upper combining with our patented Tubes cushioning system. The technology provides unmatched comfort and responsiveness through individually tuned tube structures that collapse and rebound as you walk. The Tubes Sport Ultra features multi-layered mesh with synthetic overlays and molded five chevron branding, making it a versatile choice for both training and everyday wear. •Textile Upper •Textile Collar Lining •RB+EVA50% RB+50% Outsole •EVA•CMEVA Midsole •Die Cut Ortholite Sock Liner •Lace Closure