Outsole - Lake Race 100% Carbon Fibre Sole with Mountain Race X real rubber sole.Upper - Helcor Abrasion resistant leather, full grain leather and Nufoam lining. The upper is segmented into 4 independent zones for the most flexible fit to accommodate narrow or wide feet as well as high instep and low instep feet. The mouldable heel counter doubles the heel hold for a secure fit.Closure - Dual Side mounted Push/Pull IP1 BOA® lacing system with releasable lace guides. The dual BOA® closure system offers even more adjustability than a single BOA®.