Alpinestars - STech "V" BootsNew TPU shin plate has been redesigned for greater impact absorption performance, thus improving abrasion resistance in a key area. New replaceable shin slider for additional abrasion resistance. New TPU stretch panel design with zip for an easier entry and exit and a closer, more optimized fit. Hook and loop closure secures the puller zip remains in position. Micro adjustable ratchet closure on top of boot for an optimized fit. Main upper material