La Sportiva Viper A good arrow in any quiver, this high-performance slipper is built on a modified Katana last for a straighter fit. With its thin midsole, it grips tough and holds a mean edge all day, with minimal stretching in the uppers. Get some! Features: Uniquely tensioned slingshot rand and double elastic closure provide a second- skin feel and “dialed-in” fit Hidden Heel Shock Absorber (HSA) system takes the bite out of gym and bouldering falls Gimme, gimme, gimme! Slightly down-turned toe makes the Viper a grabbing maniac Thinly padded toe box allows for great comfort especially in thin cracks