This fast slipper with a single Velcro closure system is an edging monster. Out of the box, they are stiff, supportive and ready to rumble on small edges and crystals found on technical granite faces. After breaking in and softening up, they're willing to go on steep limestone where you'll need to flex your toes and pull into the wall. The supportive rigidity that helps us stand on tiny holds also makes this shoe feel insensitive and cumbersome on slabs, but over time it softens up and starts to perform better on less than vertical terrain as well. While these shoes are at home on the steeps, their stiffness and wide toe profile don't perform well in cracks, particularly thin finger cracks, where you'll need to wiggle in as much rubber as possible.
Armed with Vibram XS Edge rubber to make the most out of small chips and nubbins, a snug fitting, non-slipping heel, and a 100% no stretch Lorica upper, the instincts excel at all style of sport climbing and bouldering. Our testers were able to heel and toe hook their way up the steep limestone of Kalymnos and used them for all sorts of trickery in the caves of Hueco Tanks.