X ALP PRO GTX is for expert mountain enthusiasts who want to move fast over technical alpine terrain, with an added gaiter and durable leather that deliver extra protection and durability to this agile, precise shoe. Patented 3D Edging Chassis maintains a rigid lateral edge for climbing rocks, edging in snow or soft conditions, etc. while maintaining forefoot flexibility. High top construction, full Gore-Tex bootie and two layers of compressed EVA ensure protection from cold temperatures, weather, and rugged environments. Full grain leather upper, protective toe and heel caps, and mud-guard ensure these boots withstand years of abuse. Material: Leather.