Yosemite BumEvolvs ultimate instrument for crack and edge climbing, designed for drawing new lines up big walls. Because multi pitch efforts are hard enough without struggling to get in and out of your shoes, we designed the YB with a split tongue to open the shoe up wide, and an easy to adjust lacing system to tune your fit through the day. Built medium volume last with neutral camber, the Yosemite Bum offers a more natural fit than some ultra narrow competitors