The Alpinestars Tech 3 Enduro boot is CE-certified to EN 13634:2017 and made from innovative and lightweight Microfibre that is flexible and highly abrasion-resistant. The toe box is made of synthetic material for high abrasion resistance, and an extended PU synthetic gaiter helps seal out excessive water and dirt entry. The Tech 3 Enduro also offers a contoured TPU calf protector plate, TPU higher medial protector, TPU outer lateral ankle and TPU heel counter to offer support and resistance to impacts, plus a rear TPR gaiter patch applied on top of the TPU calf protector gives protection and comfort on rear flex. An injected TPU shin plate connected with the TPU medial protector panel with Velcro upper closure, plus a TPR flap for broad-ranging calf fit adjustment and support. A bio-mechanical medial blade system allows a good front-rear flex, giving support and protection to the ankle.Ergonomic TPU triple buckle straps wrap the front flex harmoniously from the medial protector to the lateral side without compromising the flex. The Alpinestars closure system includes three polymer buckles with an innovative closure system. This closure includes a ratchet with memory and a quick release/locking system with a self-aligning design for easy, precise closure; all buckles are replaceable. An innovative one-piece TPU injected dual compound foot shell, reinforced by a metal shank inside a co-injected toe reinforcement, gives superior protection. Soft foam surrounds the ankles and collar to offer comfort and shock-absorbing performance with textile lining for comfort. The Alpinestars exclusive high grip rubber compound outsole is replaceable and gives enhanced feel, grip and durability.