Features: ARCTIC HUNTER backpacks are made from water repellent, breathable, durable material, the outside and the lining are very nice,come with fine stiching,metal zippers,quality USB cable works fine. All these mentioned insure the durability of a nice backpack. EXTERNAL USB CHARGEING & AUDIO JACK: A USB charge port is integrated on the side of the backpack, making it possible to charge your phone while on the go without opening your backpack. There is also an audio jack, you can listen to music anywhere anytime LOTS of FUNCTIONAL POCKETS: There are 29 pcs compartments, very oraganized. The 3 front zip pockets are all extended to the bottom of the bag. One of them is made of waterproof fabric, can hold wet items while traveling. 2 side pockets for bottle or umbrella. 1 internal big laptop compartment with anti-shock foam,2 transportation card pockets on the shoulder strap will avoid many daily troubles FITS LAPTOP UP to 15.6 INCHES: External dimensions: 13.8 × 6.7 × 18.5 inches,fits 15.6 inches laptops easily. The laptop compartment with Soft interior padding provides extra shock absorption and protection for your device against scratches and accidental bumps. Soft edge lining adds additional protection around the edges PADDED SHOULDER STRAP & PRACTICAL LUGGAGE BELT: the shoulder straps are multilayer,durable,widen,thick,padded with 10mm spongy layer which is well-cushioned to keep your shoulder and back comfy! The convenient card slots on the strap is a great plus. A luggage strap allows backpack fit on luggage/suitcase, slide over the luggage upright handle tube for easier carryingSpecification:Brand: ARCTIC HUNTERModel: B00121CColor: Black, Blue, GrayItem Type: BackpacksMain Material: Oxford