Like all Rush models, the Rush Trek GTX has the light and agile properties of a trail running shoe and the stable and protective properties of a hiking shoe. Features:Weight: 555g (½ pair/Size 42)Comfort and cushioning - Progressive body weight absorption - Activ Fit System - Activ Impact Technology - It can be resoledPresaPerwangerMaterial:Upper material: suede leather Upper material with Gore-Tex membrane: offers protection, Support and abrasion resistance, Gore-Tex Extended Comfort lining ensures waterproofness and breathability - Lacing: Lightweight loop system that distributes pressure evenly. The upper is easy to attach and avoids pressure points - Lining: Gore-Tex Extended Comfort membrane. The laminate consists of a very abrasion-resistant and quick-drying textile lining material, while the highly breathable membrane ensures optimal heat distribution. In this way, the feet will be protected from water, while the moisture will go out quickly - Sole: The TRK-01 Presa sole is made of a Supergum compound with high grip and durability. A pronounced heel promotes downhill braking and grip on climbs. In addition, the IKS (Interactive Kinetic System) technology progressively supports the weight of our body during our activity in the mountains