The Alpinestars GP-M Perforated Leather Jacket has been constructed with 1.3mm full grain leather with perforated inserts on the front, back, and sleeves. These inserts will flow plenty of air to keep you cool in even the warmest riding conditions. External PU sliders have been placed on the shoulders for protection. Alpinestars has given the GP-M Leather Jacket a snap connection system for the ability to integrate an optional CE level 2 certified Bionic Race Back Protector. As a convenience feature, this Alpinestars jacket has an internal waist connection zipper that allows a jacket to pants connection compatible with select Alpinestars leather/textile pants. Check out the Alpinestars GP-M Perforated Leather Jacket, Alpinestars gear, and other leather motorcycle jacket options on our website: CompetitionAccessories.com!