[ MULTI-COMPARTMENT ] : Dimensions: 18.9 x 12.6 x 6.3 inches, capacity: 25L. Roomy main compartment fits books, clothes, school supplies and laptop accessories. Separate shock absorption padded computer compartment fits gaming laptop up to 17.3'' [ WATER RESISTANT ] : FENRUIEN school bookbag is made of special ratio PC&ABS hard shell and high-density waterproof oxford on the outside, soft EVA and tear resistant polyester on the inside, and equipped with SBS brand water resistant coating dual zippers [ TRIPLE ANTI-THEFT PROTECTION ] : Unique double layer TSA smart customs lock design can protect the security of the items in the notebook backpack. With a hidden anti theft pocket on the back of the bag protect your valuable items from thieves(Please don't set a password before reading the instructions) [ COMFORTABLE & BREATHABLE ] : Adjustable S-shaped anti-slip padded shoulder straps and chest button can relieves the stress of your shoulder. 3D honeycomb breathable back pad with good heat dissipation and without getting mouldy [ USB INTELLIGENT DESIGN ] : External USB charging port with protective cover and built-in charging cable. This smart backpack is very suitable for you to charge your phone while walking(The cable is non-removable, power bank is not included)