The Rucksack is 11" wide x 17" tall x 7" deep (1309 ci) and features an interior 6" x 7.5" ditty bag with zipper, front zippered map compartment, a full size pocketed top flap, exterior bottle bag, and a hatchet sleeve. The enclosure is a paracord cinch with cord lock. The straps are 1.5" cotton canvas webbing, fully adjustable and generously cut to fit up to 5XL.
There's no flap retention as the cinch keeps things inside while you can place items inside the flap such as notebooks, fire kits or rain gear which weigh the flap down, keeping it in place.
1.5" wide bed roll retention at bottom along with 1.5" wide x 30" long bed roll straps included.