Upper Material: mesh Waterproofing: GORE-TEX membrane Closure: lace Midsole: BOOST Sole: Continental Rubber The waterproof and lightweight Adidas Terrex Free Hiker 2 Low GTX Shoe encourages us to get out and adventure. Designed for hiking, these shoes trust the quality of a GORE-TEX membrane for its waterproof claims, while the engineered mesh upper and EVA BOOST midsole provide breathability and cushion to go with the lightweight tag. Finally, the Continental rubber outsole brings the tacky traction we demand on the trail.