These Mt Defiance Hiking Boots by Danner were designed to provide support and stability needed to carry loads in ascending and descending terrain while keeping boot weight to a minimum. Ready to tackle the roughest backpacking conditions, these boots are made of Nubuc leather. They are 100% waterproof with a breathable GORE-TEX liner. The cushioning PU foot bed, reinforced tow box, abrasion resistant toe and heel cap, molded rubber heel counter, and Terra Force X2 platform all work together to provide a stable secure platform with all day comfort. Further, just in case that's not enough, these boots also have a PU midsole for durable shock absorption with an additional forefoot EVA layer for added cushioning. The Defiance outsole is crafted for traction over rugged terrain.