ALPINESTARS Faster-3 Shoes - Black - US 9 251021911009 rear sets The replaceable triple segmented knee

The replaceable triple segmented knee cups are constructed with a polyurethane outer shell backed with a Nucleon Plasma protector for the optimum blend of impact protection

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Frontal Flex Frame acts as a shock absorber by distributing energy across the boot frame while controlling forward and rearward flex

ALPINESTARS Faster-3 Shoes - Black - US 9 251021911009 rear sets The replaceable triple segmented kneeFaster 3 Shoes Black US 9 Upper constructed from a lightweight, durable and abrasion resistance microfiber, Enhanced Thermoplastic Polyurethane (TPU) ankle extended in lower lateral area increases support and protection, Thermoplastic Rubber (TPR) slider details on lateral toe box gives enhanced flex and protection, TPR heel counter design ensures additional lateral support and security, Asymmetric toe design gives protection on shift area,