• The Alpinestars SMX-6 v2 sport fit boot has all the great features from the SMX-6 original along with some innovative upgrades• The upper is constructed of microfiber for a superior level of abrasion resistance and long term durability• Accordion flex zones on the instep and heel area allow maximum flexibility• An ergonomics redesign to the CE certified SMX-6 v2 gives better control over the bike's controls along with improving the overall fit and comfort of the boot• For greater shock protection and strength, the SMX-6 v2 features a TPU injected shin guard, heel counter, shift pad, calf protector, and toe slider• It also features an Alpinestars TPU ankle brace that supports between the lateral top calf/shin and ankle that offers protection from impact shock ad abrasion, improves the overall structure durability and allows flex support• The ankle also features a dual density protector on the medial side that is layered under the upper giving this key performance area maximum protection multiple ways• The SMX-6 v2 has a replaceable bi-injected TPU slider that has a user friendly screw fixing concept for a stress free and speedy replacement experience• To protect the arch and foot, the SMX-6 v2 features an internal insole with shank reinforcements as well as an internal toe box• Fight fatigue and keep cool in the SMX-6 v2 thanks to the air vents on the heel counter and shin plate and breathable mesh inserts (vented versions only)• Keep your foot secured in position with the help of the interior breathable textile liner features anti-sliding suede reinforcement on the heel area• The SMX-6 v2 will give you a feeling of performance, comfort and support with the removable footbed that includes Lycra and EVA• The compound rubber sole, an Alpinestars exclusive, give the rider improved grip, water dispersion and durability• Getting in and out of this boot has never been as easy with the large entry