The right shoe plays one of the most important roles for a secure hold on rough terrain. The pinched design of the SF-21 GTX model offers maximum dimensional stability. The upper is made of high-quality suede and abrasion-resistant mesh. The waterproof and breathable GORE-TEX® membrane protects the shoe from moisture. The integrated lacing system encloses the foot and thus offers a unique hold in the shaft. The sole developed with the company SUPtraction goes over 1: 1 to rubber at the tip. The special rubber compound for rocky terrain guarantees ideal grip and precision with every step.