The Alpine Expert GTX can tackle gruelling tours in the mountains like an experienced pro. The boot has been designed to be tough and robust, but flexible enough to perform brilliantly on every terrain. The slightly higher-cut upper and the carbon insole provide the best-possible stability in any position. To ensure nothing changes even in bone-chilling regions of the world, the waterproof GORE-TEX lining with 400 grams of PrimaLoft® insulation provides a blanket of foot-warming protection from biting cold. because the materials used in the boot are robust, but flexible enough to perform brilliantly on every terrain. The slightly higher-cut upper and the carbon insole provide the best-possible stability in any position. To ensure nothing changes even in bone-chilling regions of the world, the waterproof GORE-TEX lining with 400 grams of PrimaLoft® insulation provides a blanket of foot-warming protection from biting cold.