ALPINESTARS SMX1-R V2 Boots - Black/Red - US 6 / EU 39 2224021-13-39 Universal Clamp-On Air Filter long-lasting power to the Alpinestars

long-lasting power to the Alpinestars Heat Tech System with an electronic controller for long life and security

Provides added durability over the stock cast OEM covers

Rib crew collar

The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port

ALPINESTARS SMX1-R V2 Boots - Black/Red - US 6 / EU 39 2224021-13-39 Universal Clamp-On Air Filter long-lasting power to the AlpinestarsThe main upper material is microfiber Tongue and rear accordion made by lightweight padded material that offer superior comfort Airflow and ventilation are improved thanks to lateral Air Intake with metallic mesh New speed lace system derived from Alpinestars MotoGP technology for improved quick precise and secure closure Higher closure system with new adjustable hook and loop closure and debossed Alpinestars logo Foam backed double density ankles