Never used. The back it a big too big for me. I’m small and petite. The Barrage Cargo • Rolltop design allows for an extra 4L of interior expansion • Exterior adjustable cargo net adds more carry capacity • Padded shoulder straps with yoke construction • Adjustable sternum strap with iconic Chrome buckle • Water bottle pockets which can be used as U-Lock storage • Floating bucket liner • Fits up to a 15" device, unpadded Volume: 18-22 Liters | Water bottle: Fits up to a 3" diameter Height: 20 - 22" | Width: 11.7" | Depth: 6" Weight: 3lbs (1.36 kg) Device sleeve: 14.5" x 10.5", unpadded Materials: most colors: 1050D nylon with 500D TPE tarp Red X and Black XRF: 210D recycled nylon X grid laminated sailcloth with 500D TPE tarp Castlerock Twill: recycled polyester twill with 500D TPE tarp Spot clean, hang in a well-ventilated area to dry