The D38 is constructed of RF welded 22oz. vinyl that guarantees 100% waterproof performance even when submerged. The D38 features a rigid core that enables the bag to be mounted to any bike, with or without a top rack, even when the bag is completely empty. Try that with a traditional dry bag! The rigid construction and unique 4-point strap mounting system work together enabling easy access to contents without loosening straps or removing the bag from the bike. Features: Rigid Core Construction Modular packing (mates with D20 and D28) Universal slip-lock mounting straps (included) Mounts with or without top rack Infinitely useful daisy chain mounting strip Retro Reflective Logo Adjustable & detachable carry handle Strap keepers to secure excess webbing Available in Black,Orange, or Gray Specs: 38 Liters 100% waterproof (Radio Frequency Welded Seams) 22 long x 12 wide x 9 tall 22oz Vinyl & coated Cordura Instruction Manual: English PDF Instruction Manual Part Numbers: Black D38 - SKU: DSL.D38.10001.B - UPC: 850003076102 Gray D38 - SKU: DSL.D38.10001.G - UPC: 850003076119 Orange D38 - SKU: DSL.D38.10001.OR - UPC: 850003076126