Alpinestars Supertech R Vented Boots (Black/White) Size US 13 / EU 48 A3 SPRINT ULTRA is our pinnacle

SPRINT ULTRA is our pinnacle race and gravity product group

3 shell sizes for the lightest

Back compartments can accommodate the Nucleon back insert (available as an accessory upgrade)

non-breathing polyester abrasion panels typically found at the ribs

Hold snug phone specific pocket

Alpinestars Supertech R Vented Boots (Black/White) Size US 13 / EU 48 A3 SPRINT ULTRA is our pinnacleAlmost every component of the Supertech R Vented Boot, Alpinestars definitive racing boot as worn by a roster of champions past and present, has undergone a rigorous program of upgrades to sharpen its performance features even further. Featuring extensive perforations throughout for maximum airflow, innovations derived using feedback from Alpinestars involvement in top flight racing include a newly redesigned front flex area, a redesigned rear bellow,