The ZG Trek GTX is designed for moving quickly and easily on mountain trails. It's built on a new rolling last shape, with a pronounced rocker, giving a more natural and comfortable gait compared to conventional walking boots. The new Vibram Salix Trek sole has two cushioning layers to give maximum protection underfoot and a very comfortable, progressive walking feel. The ZG Trek has a durable suede upper with lightweight thermos-embossing for structure and support without compromise. The Gore-Tex Performance membrane ensures all-weather protection, and the speed lacing system provides a secure fit around the foot.