The Okapi ATS is a versatile, breathable and quick-drying all-terrain sneaker, featuring waterproof HELLY TECH membrane. This lightweight approach shoe offers great traction, stability and cushioning. Fiber Content Outer: mesh Lining: mesh Sole: rubber Features Upper: HH® Max-Vent, HH® Quick Dry, HH® Lite-Frame, Flowknit, HH® Pro Guard Midsole: HH® Power-Stride, HH® Max-Comfort Insole, Antimicrobial Outsole: HH® Max-Grip, HH® Tough-Wear Performance Windproof: Slightly windproof - 13-30 CFM Breathable and wind resistance for hiking use Waterproofness: High waterproofness - Waterproofness range is Helly Tech Performance range 10000 to