Alpinestars SMX-6 V3 sport boots black / white

Sport motorcycle boots engineered for track and street performance. The Alpinestars SMX-6 V3 feature race-derived protection, refined ergonomics and everyday comfort, with a newly designed upper that closely follows the foot’s anatomy for optimal flexibility and improved walking comfort. :contentReference[oaicite:0]{index=0}

The main upper is constructed from advanced microfiber for durability, abrasion resistance and lightweight feel. New front and rear flex zones use textile over-injected on 3D mesh with soft TPU to promote natural forward/back motion and enhance comfort and control on the bike. An elastic front gaiter delivers a precise fit in varying conditions. :contentReference[oaicite:1]{index=1}

An evolution of Alpinestars’ ankle-brace protection provides biomechanical support between the lateral top calf/shin and the ankle for superior articulation and impact protection. Additional safeguards include a race-derived TPU shin plate, dual-density TPU ankle protectors, a TPU shifter zone and a new back-calf TPU bridge for reinforced support. CE certified to EN 13634:2017. :contentReference[oaicite:2]{index=2}

The medial side entry/closure system pairs an elastic-mounted zipper with a wide hook-and-loop panel for quick, secure fastening. A replaceable dual-density TPU toe slider (screw-in) offers comprehensive coverage at the outer toe while remaining flexible enough for off-bike comfort. :contentReference[oaicite:3]{index=3}

Inside, a dual-compound removable anatomic footbed (EVA with Lycra top) works with an internal insole featuring an integrated shank to support the arch. The streamlined inner contact surface improves feel on the controls, while a lightweight rubber-compound outsole ensures excellent grip on the pegs. Sizes EU 36-50 (availability may vary). :contentReference[oaicite:4]{index=4}

Materials
Advanced microfiber upper; textile/TPU front & rear flex zones; multiple TPU reinforcements. :contentReference[oaicite:5]{index=5}

Closure
Medial elastic-mounted zipper with wide hook-and-loop (Velcro) flap. :contentReference[oaicite:6]{index=6}

Protection
Biomechanical ankle-brace system; TPU shin plate; dual-density ankle protectors; TPU shifter zone; replaceable dual-density TPU toe slider; CE EN 13634:2017. :contentReference[oaicite:7]{index=7}

Interior
Removable anatomic EVA footbed with Lycra; internal insole with integrated shank; internal toe-box layered under the upper. :contentReference[oaicite:8]{index=8}

Outsole
Lightweight rubber compound for excellent grip on the pedal box. :contentReference[oaicite:9]{index=9}