· Dimensions: The overall dimensions of this laptop backpack is 12.6" L x 6.5" W x 18.6" H, designed to carry up to 31 liters· Lots of Storage Space: 1 separate laptop compartment holds 15.6 inch laptop; 1 spacious packing compartment roomy for papers, daily necessities or electronics accessories; Front compartment with many pockets to pack pens, keys and notebooks; Easily and neatly organized, perfect for daily work or business travel· Precise Protection: The laptop compartment features 3D EVA foam padding provides superior shock absorption, meet the IT engineers' need of protection for the laptop· Easy Traveling: Unfolds the extra large backpack freely 90-180 degree making you quickly through the airport security and keep items tidy, exclusive designed for airplane traveling· Comfort & Sturdiness: Comfortable airflow back design with thick but soft multi-panel ventilated padding, gives you maximum back support. Breathable and adjustable shoulder straps relieve the stress of shoulder; A rubber handle over a braided steel cable on top to grab the bag so it is solid and durable