Constructed from heavy gauge nylon coated fabric. Stiffened roll-top closure creates a watertight seal. Three fold/rolls, then buckle shut, and all water is kept out. Comes with a high strength shoulder strap/sling for long distance carry. This bag will provide exceptional protection from the elements when out in the field. Fits weapons cases below 48 in length. Measures 50 x 19. Weighs 1.19 lbs.