Stonefly Men Hiking Boots Europe Men Shoe Sizes Listed GORE-TEX? footwear - water-resistant and good breathability Stonefly's Shock Air technology - keeps your feet dry , it changes the air inside your shoes, 40 steps equal 100 percent air change Stonefly's Blusoft technology - walking in comfort, shock absorption grows by as much as 75 percent Stonefly's Blusoft-Energel insert is placed inside the shoe and absorbs impact of your feet from the ground Solid Griping Outsoles