The Scarpa Instinct S subtlety blends the characteristics of the Velcro and Lace-Up versions to create a superb technical climbing slipper. The slipper features a five pannelled microfibre upper which provides great flexibility and ensures that the shoes hold their shape longer than leather equivalents. The Scarpa Instinct S has a Vibram XS-Grip 2 3.5mm sole to ensure your feet will stay planted on the smallest of edges and stiffens up the toe increasing responsiveness. CTS-Combined Tension System intimately connects the toe and the heel of the shoe helping to increase overall performance which is guaranteed to last. The REB Reinforced Elastic Closure keeps the heel of the shoe firmly secured to your foot even on the most demanding heel-hooks and ensures quick and easy on and off.Scarpa Instinct S (Sizes 36/39.5) Features: Five Panelled Microfibre Upper REB Reinforced Elastic Closure Seamless Big Toe Panel Seamless Four-Toe Panel XS GRIP2 3.5mm Outsole M50 Rubber Toe and Heel Patches 1mm Half-Length Flexan Mid-Sole Insert CTS-Combined Tension System PAF Innovative Heel System Re-soling Possible Weight Approx 440g / Pair Size 38