Alpinestars Tech Aero Backpack available at Motostrano.com. Fully expandable from 16L to 26L (approx). Water resistant fleece lined audio pocket with headphone exit port. Hidden helmet carrier. Sternum Map panel holder. Internal Lap Top sleeve which fits most 15? Lap Top Computers. Internal organizer pockets. Internal sleeve for Bionic Back Protector application. Built in Rain Cover.