MOUNTAINTOP 40 Liter Hiking Backpack with Rain Cover for Outdoor Camping 6 ADJUSTABLE STRAPS- For tying up your pack or hanging sleeping bag, mat, hammock, tripod, and other gears. Computer Compartment: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. It meet size requirements for most airlines. The hip belt is adjustable but can not be removed.(the size:25--53 inches) -WARRANTY- Includes 90 days limited warranty for hiking backpack