The JacksonPac is VestPacs most basic model. Two pockets and a key ring make it ideal for snow, dirt, road, surf, and anything in between. The patented 3D Airmesh technology keeps you warm in the winter and cool in the summer while providing superior comfort and durability. Two chest centered pockets with cinch flaps for secure convienient storage. Includes front, back, straps, and 1 liter hydration reservoir. The low-profile back panel houses a hands-free hydration system.