The Alpinestars Tech Aero backpack is made for the riders that are looking for comfort and convenience. The comfort is realized by the new anatomical shoulder straps and the convenience is secured by the fact that the backpack is fully expandable from 16 to 26 liters. Furthermore, the backpack is water resistant and there is also a fully enveloping rain cover included. When you want extra safety, there is an internal sleeve that allows integration of Alpinestars’ Bionic Back Protector.