Check the listing for details. Alpinestars SMX-6 V3 Boots - Black/Silver/Red. Color: Black/White, Condition: New with box. Listed at 338.75 USD. SMX-6 V3 Boots are the ultimate track and street performance riding boots packed with race-derived technology and protective materials designed to give riders a crucial performance edge on the track or street. With its newly designed upper, the SMX-6 V3 has been precision-engineered to closely conform to the anatomical contours of the foot, offering optimal flexibility and improved walking comfort. Every component on the SMX-6 V3 Boots has been carefully designed with rider performance in mind. • New, race derived TPU shin plate protector is designed for superior impact and abrasion resistance while offering an even more compact design, so the boot easily fits under the pant, as preferred. • A new strategically positioned, race-derived TPU shin plate protector delivers superior impact and.