Evolv's 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, Evolv 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 in the category.