The D28 is constructed of RF welded 22oz. vinyl that guarantees 100% waterproof performance even when submerged. Unlike other dry bags, the D28 features a dual-end roll design that allows access to belongings from either end of the bag without having to disconnect the mounting straps. The D28 is perfect by itself for short trips, but is the ideal add on bag for a D38 or your existing side cases. Features: Dual-Ended opening Modular packing (mates with D20 and D38) Universal quick release mounting straps (included) Mounts with or without top rack Stupendously useful daisy chain mounting strip Retro Reflective Logo Strap keepers to secure excess webbing Welded carry handle Available in Black,Orange, or Gray Includes 4 straps Specs: 28 Liters 100% waterproof (Radio Frequency Welded Seams) 22 long x 9 wide x 9 tall 22oz Vinyl & coated Cordura Instruction Manual: English PDF Instruction Manual Part Numbers: Black D28 - SKU: DSL.D28.10001.B - UPC: 850003076072 Gray D28 - SKU: DSL.D28.10001.G - UPC: 850003076089 Orange D28 - SKU: DSL.D28.10001.OR - UPC: 850003076096