Product Description NAVIGATE THE UNKNOWN WITH ADVANCED XC SHOES ENGINEERED FOR COMPETITION. >>Sleek, low-profile crossover lacing pattern elegantly secures the forefoot. >>BOAA(R) Fit System with a pair of compact L6 type Z dials supports a precise fit. >>Remarkably light and rigid carbon-reinforced midsole for optimal power transfer. >>Lightweight SHIMANO ULTREAD XC rubber outsole delivers competition-grade grip. >>Rider-tunable spikes let you optimize grip for riding styles and conditions. >>Low stack height midsole stabilizes the foot and optimizes power transfer. >>Surround-wrapping upper structure reduces overlap and provides a glove-like fit.