Rubber sole User profile: hikers looking for techinal leather boots that are influenced by fast/light running shoes. They offer foot/ankle protection and support for light/medium loads. Weight: 450 g / 16 oz per shoe GORE-TEX Waterproofing: Keep your feet dry with GORE-TEX waterproof and breathable lining. The Nubuck Leather upper with debossed detailing is highly abrasion and water resistant. SIZING & FIT: Runs Small. Normal or Large Feet - buy 1 SIZE UP. Small feet - buy 1/2 Size Up. Available in both Regular(D) and Wide(E) widths. Users who hike long distances, use thick socks, or are new to La Sportiva may consider an addition 1/2 up. Sure Grip: Frixion AT 2.0 Outsole with Impact Brake System provides excellent traction and stability on steep descents, slick trails and uneven ground. Injection-molded Memlex midsole provides ample cushioning, stable support. Nylon molded flex TPU transfer shank provides stability along the length of the foot. Foot & Ankle Support - Reinforced heel cup provides stability for high mileage days on rugged and rocky trails. Innovative lacing system distributes tension evenly over the foot for a supportive fit and feel. Rubber toe cap protects toes from unexpected trail obstacles.