ALPINESTARS SP-X BOA Boots - Black/Silver - EU 40 2222024-119-40 perfect High-modulus midsole follows the shape

High-modulus midsole follows the shape of the foot and incorporates a structured shank reinforcement

Durable top-grade vinyls and bright accent stitching with a supple upper-foam layer produce a seat that is as effective as it is stylish

657"/220mm Xmax: 0

this book covers it all

ALPINESTARS SP-X BOA Boots - Black/Silver - EU 40 2222024-119-40 perfect High-modulus midsole follows the shapeSP 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