ALPINESTARS SMX-1 R v2 Boots - Black/White - US 12 / EU 47 2224521-12-47 Replacement Air Box Covers High performance extension for the

High performance extension for the DF-12 Diffusers

sleek and promote exceptional resistance against impacts

yielding more area above the cover and with a shell that is smoother along the Snell test line in the temple area

reverse coil zipper front closure

but also smooths airflow over (and from the side) of the helmet

ALPINESTARS SMX-1 R v2 Boots - Black/White - US 12 / EU 47 2224521-12-47 Replacement Air Box Covers High performance extension for theA class leading, low cut performance riding boot, the SM 1 R v2 Vented Riding Shoe incorporates a host of technical innovations for improved levels of comfort, fit and durability. Constructed from a lightweight and abrasion resistant microfiber upper with extensive perforations for maximum airflow and breathability, the shoe is also equipped with strategically positioned TPU protectors for abrasion resistance in a key area. The SMX 1 R v2 Vented