The Supertech R Vented Boot Alpinestars definitive racing boot features extensive perforations throughout for maximum airflow a newly redesigned front flex area a redesigned rear bellow a redesigned top gaitor a new shifter and shin plate a new shin slider and a new inner bootie all of which enhance the comfort protection and the performance of this boot to a new class-leading high. Main upper material constructed using microfiber with a dedicated laser perforation zone for optimum breathability. Synthetic microfiber panel on medial side for enhanced abrasion resistance. TPU shifter for increased protection on lower medial side. TPU stretch panel design with zip for easier entry and exit along with a more optimized fit. Hook and loop closer secures the zipper pull in position. Micro adjustable ratchet closure on boot top. Bio-mechanical inner bootie with TPU-reinforced external toe area.