The Alpinestars SMX-6 v2 Motorbike Boots are packed with features...Specifications Include:CE Approved - This is considered to be an item of Personal Protective Equipment (PPE)New microfiber design on front, rear bellow and rear calf plus TPU ankle brace protector to give more protection, flexibility and stabilityDurable hi-tech microfiber upper construction offering superb levels of flexibilityTPU lateral ankle brace protection provides biomechanical support between lateral top calf/shin and ankle and offers improved structural integrityAir vents on shin plate, cuff and heel counter with breathable mesh insertsHigh modulus TPU injected shin guard, calf protector, heel counter shift pad and lateral ankle braceInternal Safety Protector: visible double density ankle protector on medial side located between the upper and liningIntegrated, replaceable bi-injected TPU slider features easy screw fixing conceptInternal insole with the shank reinforcement integrated for added support to the arch areaMedial side entry opening/closure system features elasticmounted zipper with wide Velcro closure. Velcro tab locks the zip pull closed, keeping it flat and secureWide opening aperture for ease of accessInternal toe box protection is layered under the upperBreathable textile interior lining features anti-sliding microfiber suede reinforcement on heel areaRemovable anatomic footbed includes EVA and Lycra for comfort and support Alpinestars\' exclusive compound rubber sole promotes improved woter run-off and grip