Alpinestars SMX Plus V2 Boots - BLACK WHITE - 48 - 2221119-12-48 The Alpinestars SMX Plus V2 Vented Boots are the next generation of the popular SMX Plus line, known for track day performance and protection. A high shin plate helps guard against impacts from your foot pegs. Ankle protection comes in the form of Alpinestars' signature Multi-Link Control system that helps keep your ankle from moving in ways it is not supposed to while still giving you enough range of motion to operate foot controls. A wide heel counter wraps around the back of your foot with shock absorbing padding. A replaceable heel slider keeps you moving in the event of a crash. Accordion stretch zones at key areas provide flexibility and improved fit. Perforation throughout the boot with strategic vents in TPU help flow air to your feet.