TPU blade system provides flexibility while helping prevent frontal hyperextension. CE certified, Instep and Achilles accordion flex zones for superior support and control, Removable anatomic footbed, Innovative TPU lateral ankle protection provides biomechanical link between the middle lateral and the bottom lateral of the boot. TPU blade system provides flexibility while helping prevent frontal hyperextension, TPU shin-plate construction and a reinforced hook-and-loop closure offers a comfortable, Polymer buckles with aluminum frames provide self-aligning, Microfiber gaiter helps keep out water and dirt. High-grip, Upper is constructed from a light microfiber that provides flexibility and abrasion resistance, Upper is constructed from a light microfiber that provides flexibility and abrasion resistance, highly customized fit, Wide entry aperture and a hook-and-loop upper closure TPR flap allows for a broad range of calf fit adjustments for comfort and support. highly customized fit, Shock absorbing soft poly-foam surrounds ankles and collar, TPU shin-plate construction and a reinforced hook-and-loop closure offers a comfortable, quick-releaseclosures for personalized fit, Alpinestars Tech 7 Boots-Yellow Flo/Red/Flo/Gray/Black-13: Automotive. Ergonomic buckle system offers secure and highly personalized fit, Toes protected by metal shank reinforced TPU shell, double-density rubber outer sole is removable and replaceable, Breathable mesh 3D liner with anti-sliding microfiber suede reinforcement in the heel, Buy Alpinestars Tech 7 Boots-Yellow Flo/Red/Flo/Gray/Black-13: Boots - ✓ FREE DELIVERY possible on eligible purchases, Single-piece TPU panel with honeycomb sculpturing for maximum grip contact with bike and improved heat and abrasion resistance on the medial facing area, Top rear flexion of the boot is supported around the calf by an innovative TPU sliding blade system helps to dissipate friction.