Features of the La Sportiva Men's Helios III Shoe Lightweight and super cushioned, this shoe is ideal for on and off road running Highly-breathable Upper and comforatable Fit Upper: Lycra Cuff / HyDrain Air Mesh/ No-Sew TPU Reinforcements/ Mono-burr Mesh and Rip-Stop Nylon Panel Inserts/ Thermo Formed Toe Cap Lining: Abrasion Resistant Micro-Fiber (Heel)/ Wicking Air Mesh (Toe) Insole / Midsole: 4mm Ortholite Insole/ 4mm LaSpeva/ MorphoDynamic Injection Molded MEMlex EVA/ Cushion Platform Sole: FriXion AT 2.0 compound with 2mm deep VA Wave Pattern lugs Soft, long lasting compound with good grip Impact Brake System soles also offer superior grip on very steep Due to the slanted and opposing angles of the lugs, the impact forces Are reduced