Lightweight, high-performance cross-country shoes with unparalleled power transfer, benefitting from S-PHYRE trickle-down technologyOptimized upper pattern to maximise foot support and ventilation,Surround wrapping upper structure reduces overlap, providing a glove-like fit and eliminating hot-spots,Low stack height midsole helps stabilize foot, maximizes power transfer and efficiency,BOA® L6 skeleton dial for quick and precise micro-adjustment,Brand new sole construction, based on the S-PHYRE XC902, complete with Shimano ULTREAD™ compound for maximum grip and durability,Optimised stud pattern to avoid mud stacking,Glass fibre reinforced midsole for power transfer,Severe Condition Spikes sold separately (SMSHXC902MSKL01000),Weight: 300g (size 42),Stiffness rating: 6.