Multi-talented bike backpack with maximum back ventilation in the female specific version. The women's rucksack features a flexible spring steel frame and an effective, three sided ventilation system - high carrying comfort, low weight! Mesh shoulder straps, mesh hip fins with two zipped mesh pockets and Aircomfort FlexLite back system for three-sided ventilation. Hydration system compatible with separate bladder compartment secured by autolock zip, Velcro sealed drinking tube opening and tube line. It's equipped with comfort, space, and safety in mind: internal organizer and tool mesh pockets, zipped front pocket, side compression straps also suited for fixing protective pads, stowable helmet flap, detachable rain cover, and reflective safety light and tube loop.