Chiruca Gredos Supra GORE-TEX boots are made of optimal materials in durability, climatic comfort and weight, such as Vibram soles designed for the most difficult conditions on any type of surface, or the GORE-TEX membrane. Characteristics: - Scotchgard hydrofuged nubuck leather - Hydro-repellent sanity - GORE-TEX Performance Comfort Lining - Rubber sole Vibram Hiking Man - Weight: 700 g Technologies: GORE-TEX This membrane achieves that the feet do not get wet with the outside water and that at the same time they can perspire. The result is waterproof boots from outside to inside and permeable from the inside out. - Durable waterproofing: the GORE-TEX membrane is formed by a microporous structure that contains more than 1,400 million microscopic pores per cm2. These pores are approximately 20,000 times smaller than a drop of water, making it impossible for water to penetrate the membrane.