100% polyester with DWR finish. Ergonomic single strap harness with waist strap. Waist strap can be tucked away. Front main zippered compartment has internal sleeve and zippered mesh pocket with key fob. 2nd zippered pocket with fleece lining. Zippered stash pocket on the strap. Two compression lashing straps on front. Patagonia and Lindblad/National Geographic Expedition patches. Good condition. Measures approximately 15" long, 10" wide, 4.5" deep at bottom.