Alpinestars SMX-6 V3 Boots — EU 45, US 10.5, mid-calf, Black

Designed for high-performance track and street riding, these boots combine race-derived technology with focused protective systems to give riders a decisive performance edge.

• Advanced microfiber upper construction for lightweight abrasion resistance and excellent flexibility.
• Front flex and rear flexion zones use textile over-injected with a soft thermoplastic polyurethane for enhanced impact abrasion protection while allowing natural forward and backward movement.
• A biomechanical ankle brace system provides support between the lateral calf, shin and ankle to limit hyper-torsion, hyper-extension and hyper-flexion while shielding the Achilles and ankle.
• An advanced polymer resin lace-lock system offers a quick, precise and secure closure for consistent fit.
• TPU shifter zone and a strategically positioned TPU shin plate deliver superior lower medial protection and impact abrasion resistance.
• Dual-density ankle protectors and replaceable toe, heel and side sliders with screw-in assemblies provide targeted protection, shock dissipation and walking comfort.
• Material composition: 37% TPU, 35% microfiber, 11% polyester, 8% polyurethane, 8% TPR and 1% elastic. Lining: 82% polyester and 18% synthetic.

Replaceable components and race-oriented protection make these boots ideal for riders seeking durability and performance on both track and street.