Features: Ergonomic, aluminum buckle system offers secure and highly personalised closure. Innovative TPU lateral ankle protection provides biomechanical link between the middle lateral and the bottom lateral of the boot. Instep and Achilles accordion flex zones are constructed for superior control and support. TPU lower shell is reinforced with a metal shank and includes toe reinforcement for impact and abrasion resistance. Extended microfiber gaiter helps seal out excessive water and dirt entry. New closure system includes aluminum buckles plus aluminum frame with innovative self-aligning, quick release closures for customized secure fitment. All buckles are replaceable. Breathable mesh 3D liner with anti-sliding microfiber suede reinforcement on the heel area. Soft poly-foam surrounds the ankles and collar offers comfort and shock absorbing performance. Removable anatomic footbed. Exclusive high grip rubber double density compound outer sole. Sole and footpeg insert on sole are replaceable. The Alpinestars Tech 5 are CE certified.