This brilliant approach & everyday shoe has a technical, almost climbing shoe fit & feel making the Boulder X a good choice for outdoor professionals & instructors wanting a shoe for lower level climbs as well as walk-ins. The patented Asymmetric lacing system derives from the Mythos climbing shoe project, which gives the shoe a very precise & controlled feel on steeper ground. Underfoot comfort has been enhanced with additional shock absorption for long approaches & the Vibram Idro-Grip sole stays sticky on all rock, even in the wet giving you supreme confidence in all conditions. This sticky sole also utilises the clever Impact Brake System with lugs at opposing slanting directions to increase braking power by an average 25% & decrease impact forces by an average of 20%. Basically they grip better & feel more comfortable. Patented lacing system inspired by the Mythos project. New Vibram sole with Impact Brake System & climbing zone on the toe. Reinforced uppers with full rubber r&.