SP-X BOA Boots BlackSP X boots are a sleek sport boot designed to fit under tech riding pants and provide superior walking capability Optimized for the sport and sport touring rider, the SP X are compact, mid height boots with premium levels of protection and comfort on and off the bike The upper is constructed from a combination of Rideknit material and knitted mesh, plus seamless thermo welded parts The lower features a TPU heel counter, toe slider, and the Alpinestars