Excellent ventilation and compact fit for optimum driving safety through Airstripe's back system. 3M reflector, Reflective loop for safety light, Ultralight shoulder straps and hip fins. Reflective flashing light holder, Airstripes system, Stretch compartment Valuables pocket, Sternum strap. Purse, tools, etc. neatly stowed in a large zipped front pocket with organizer compartment. Loops for helmet holder (accessory). Removable rain cover. Hydration system compatible 3 liters 100 oz. Wet clothing. Continuously adjustable chest strap.