La Sportiva Size Chart Neutral, stable, all-terrain cushioning shoe with Gore-Tex(R) lining designed for longer runs, rugged terrain and conditions that require the most protection. The upper is waterproof, abrasion resistant and designed for a precise fit. A MeMlex midsole and TPU heel counter provide cushioning and stability, and the FriXion XF outsole ensures great traction in all conditions. Features: - Waterproof, breathable Gore-Tex(R) membrane for excellent protection from moisture - HF reinforcements on the lacing harness provide a great fit - Frixion(R) XF outsole provides amazing grip and traction on the trails - Weight: 11.6 oz/ 328 g - Fit: Medium/Wide - AirMesh/ Abrasion resistant microfiber upper with HF Lacing Harness - TPU Transkinetic Heel Stabilizer - Gore-Tex(R) Extended Comfort lining - EZ-in(TM) Heel Pocket - Injection Molded MeMlex midsole with Nylon(R) molded flex Transfer shank - Drop: 12mm - FriXion(R) XF outsole with Impact Brake System(TM) X-Axis(TM)