The SCARPA Ribelle® Run Kalibra G takes the best parts of our most technical running shoe and combines them with a few mountaineering-boot-inspired features for an all-weather, all-terrain juggernaut of a trail runner. With the same profile as the Ribelle® Run, the Kalibra G can handle precise footwork in technical terrain without batting an eye. The specially designed sole with the ultra-sticky PRESA rubber offers reliable traction, no matter what condition the trail is in. Because you'll be headed out in a variety of conditions, we included a stretch gaiter to keep mud and snow out, as well as a BOA® Fit System that delivers micro-adjustable, precision fit engineered to perform in the toughest conditions. 4mm of drop gives just enough padding to cushion the occasional heel strike, while still giving you that low drop heel you want for a more natural stride.