NorthEast Products X-Pak Combo 

Multiple compartment backpack that features waterproof Silent-Touch fabric with two side mesh pouches, adjustable bungee cord front, heavy duty zippers and pull tabs. Comes with a detachable seat made of multiple layers of closed cell foam laminated to Silent-Touch fabric with layers of Optipoly comfort foam sandwiched in between for triple the comfort. Backpack and seat in MO Break-Up camo. Dimensions: 13" X 14" X 2.75" seat, 2100 cu. in.