ALPINESTARS SMX+ Vented Boots - Black/Red - US 10.5 / EU 45 2221119-13-45 Breather Kit 91-17 XL Its distinctive shape was developed

Its distinctive shape was developed especially for the Yamaha YZF-R1 based on Akrapovic’s vast racing experience

Embossed areas highlight the internal guards for added aggressive style

The outer sleeves and collector are constructed from lightweight titanium

Die-cast construction with a black rubber insert

Used on motor mount bars as well as passenger footpeg bars

ALPINESTARS SMX+ Vented Boots - Black/Red - US 10.5 / EU 45 2221119-13-45 Breather Kit 91-17 XL Its distinctive shape was developedThe SMX Plus v2 Boot perfectly blends sleek sports styling with advanced protection features developed in Alpinestars performance footwear department. The durable and light microfiber upper is reinforced with a rugged polymer protector and the exclusive Multi Link Control (MLC) system prevents ankle torsion while offering freedom of movement. Advanced microfiber upper construction for lightweight high performance protection and superb levels of