• High-density nylon and polyester, high-quality ABS buckle， lightweight, durable and easy to clean.
  
• 25L. Main pocket can hold 14 inch laptop and A4 size files, front zipper pocket fit for iPad mini or 7.9" tablet, both sides mesh pockets fit for 553ml water bottle.
  
• External expansion system that can be used in combination with other devices. You can assemble auxiliary pouches, bottle sleeves, tactical straps or other accessory kits as you like.
  
• Ventilated mesh padded back and shoulder straps, comfortable to use in long distance hiking. Durable nylon buckle, high strength even in cold weather. Perfect for hunting, camping, traveling, trekking, tactical, outdoor, cycling, motorcycle, saddlebag and other activities.
• Size-28.0 x 19.0 x 47 cm