ALPINESTARS SMX1-R V2 Boots - Black/White - US 5 / EU 38 2224021-12-38 Grip Donuts Constructed of PA6 nylon for

Constructed of PA6 nylon for high-resistance to chain-wear and shock

Spring sets are heavy duty

This kit allows the heating elements to fit neatly and discreetly under the original or aftermarket grips

Injected TPU shin plate connected with the TPU medial protector panel

ALPINESTARS SMX1-R V2 Boots - Black/White - US 5 / EU 38 2224021-12-38 Grip Donuts Constructed of PA6 nylon forThe 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