RC4 PRO MV is the high-performance boot packed with ALL the latest techonologies. New BOA® H+i1 system wraps the shell to every foot shape, plus a ZipFit® liner guarantees heel lock and ample circulation to toes. CARBONFUSED cuff offers even more direct power transfer. To ensure an optimal fit for the most skiers, the RC4 MV boots have a FISCHER Scan-Fit® last, developed using thousands of foot scans.