Material:Polyester. YKK Zipper and YKK Buckle
The main compartment is the size of the whole backpack. Mine is 20″h x 12″w x 4.5″ deep.Your Laptop(big enough for a 17″laptop).There is a compartment that can be used for a bladder and a holding place for the tube but no specific bladder space.
The size is perfect and meets the personal carry on for airlines such as frontier so you can load these down and not pay for a checked bag.
Includes an adjustable hip belt on this bag that fits waist sizes 25–55 inches,but the belly strap is not removable.An adjustable sternum strap, breathable molded foam back panel, and S-shaped shoulder straps ensure you can properly carry the weight of your gear.
This backpack is impressively practical for shorter treks,there’s a wide color selection to fit any hiker’s style.If your torso is longer than 52 centimeters, then Mountaintop recommends you seek a different pack.