Comfort, storage capacity, and protection are the key ingredients for a great backpack and this one excels at all three!The comfort starts with the thickly padded, 2.5 wide shoulder straps and thick, vented back padding. An elastic chest strap helps keep the backpack from flopping around as you jog or hike, and the rubber covered zipper pulls are both more comfortable than traditional metal zipper pulls and less prone to slippage.This backpack features three large compartments to store all your stuff. The compartment closest to your back is designed for storing a laptop up to 16 in size. The laptop compartment is directly against your back with about 1/2 thick of padding. A padded internal divider keeps the laptop in place and an elastic, 1 wide strap with hook and loop material keeps the laptop securely inside its special subcompartment.In addition to the laptop subcompartment, the rear compartment includes an additional 2-3 of storage space and features an additional, unsecured nylon pocket. In total, the rear compartment features about 18 x 11 x 4 of storage space.The middle compartment is plain, with no additional pockets or other subcompartments. It offers about 17 x 11 x 2 of storage space, with the width somewhat less where the exterior curves over the top. The third compartment features a traditional workstation with three pen-sized pockets, and four other pockets of varying width, including a single pocket that spans the width of the bag. This last compartment offers about 12 x 9 x 1.5 of space. Additionally, each side of the bag features a small 6 x 3 zippered pocket, which is ideal for phones, mp3 players, etc.The backpack is constructed of heavy-duty, ballistic nylon and features a rubber-covered handle.*** 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty. ***