Alpinestars SMX Plus Boots - Black US 9 / EU 43 (Part Number 2221019-10-43)

The Alpinestars SMX Plus Boots are engineered for high-performance motorcycle riding, combining advanced protective features with a lightweight design. Crafted with an innovative microfiber upper, these boots offer superb flexibility and abrasion resistance, ensuring durability during intense riding conditions. The front flex zone, made from soft microfiber, facilitates natural movement while maintaining protection, making them suitable for aggressive riding styles. An accordion microfiber panel near the Achilles provides enhanced natural articulation, allowing for smoother foot movements and increased comfort throughout extended rides. The outside entry and exit are simplified by a stretchable accordion panel, enabling a close fit and effortless removal, which is particularly beneficial during quick stops or on-the-go adjustments.

Built for optimal support and protection, these boots feature Alpinestars' multi-link control system, which offers external support for ankle articulation while limiting hyper-torsion, hyper-extension, and hyper-flexion. This system helps prevent injuries and provides a secure fit, especially during aggressive maneuvers. Additional protective elements include a dual-density TPU (Thermoplastic Polyurethane) replaceable toe slider with a screw-in assembly, shielding the outer toe area, and a replaceable heel slider positioned to absorb shock and facilitate sliding during an accident. Large asymmetrical accordion zones on the front and rear enhance flexibility and comfort, ensuring maximum safety without sacrificing mobility.

The internal lining features advanced synthetic materials laminated with open-cell foam, providing superior shock absorption and breathability. The anatomical, replaceable EVA footbed offers excellent arch support and a natural pedal feel, contributing to overall riding comfort. The durable rubber sole is textured to deliver consistent grip and improved riding feedback. Entry is secured via an inner instep speed lacing closure combined with a lateral zipper, which ensures a snug fit and quick donning. An Alpinestars Lace-Lock System, made from an advanced polymer resin, guarantees a quick, precise, and secure closure, while hook-and-loop tabs lock the zipper pull in place for added safety.

For maximum impact protection, the boots include a contoured high-modulus shin plate that resists abrasion and absorbs impacts effectively. The micro-adjustable ratchet top closure allows for fine-tuning the fit, and the design incorporates highly breathable ankle and leg linings to keep your feet comfortable during long rides. These boots are a perfect blend of protection, comfort, and performance for serious motorcyclists seeking reliable gear for demanding conditions.

Features:

• Advanced microfiber upper construction for lightweight protection and flexibility

• Front flex zone with soft microfiber improves movement and abrasion resistance

• Achilles accordion microfiber panel for enhanced natural movement

• Stretchable accordion panel for easy entry and close fit

• Multi-Link Control system limits hyper-torsion, hyper-extension, and hyper-flexion, supporting ankle articulation

• Dual-density TPU replaceable toe slider with screw-in assembly for outer toe protection

• Replaceable heel slider and external side heel slider for shock absorption and sliding during accidents

• Large asymmetrical accordion zones optimize flexibility for comfort and safety

• Micro-adjustable ratchet top closure with stow tab end for a secure fit

• Advanced synthetic forefoot lining laminated with open-cell foam for shock absorption

• Breathable ankle and leg linings for enhanced comfort

• Anatomical, replaceable EVA footbed provides arch support and pedal feel

• Durable rubber sole with textured grip for consistent riding feel

• Inner instep speed lacing closure and lateral zipper for precise fit

• Alpinestars Lace-Lock System for quick, secure closure

• Hook-and-loop tab locks the zipper pull in place

• Contoured high-modulus shin plate offers impact and abrasion resistance