adidas terrex free hiker 2.0 hiking shoes are designed to take your outdoor exploration further. crafted with a boost midsole, these shoes offer long-lasting cushioning and energy return, while the mesh upper with seamless overlays provides breathable comfort and a sock-like fit. the adaptive knit collar prevents dirt and debris from entering, and the continental™ rubber outsole ensures grip and stability in all terrains. what's more, the upper is made using a high-performance yarn that contains at least 50% parley ocean plastic, recycled from beachside and ocean communities. the other 50% is recycled polyester.