La Sportiva Stream GTX Walking boots Men (42,5, black) - Thanks to the GORE-TEX Surround construction, the Stream GTX walking boot from La Sportiva will release any excess heat through the side vents. That way, your feet will be dry and comfortable inside this waterproof boot, even on more physically demanding walks through the mountains. The cushiony EVA midsole and grippy Vibram XS Trek outsole provide both excellent grip and stability on various surfaces. The mid-high collar serves to protect the ankle and provide extra joint support. The Nano Cell 2.0 structure is light and provides maximum breathability, resulting in an ultra-light, fast and stable shoe for the mountains.