• Light nylon fabric, tear - resistant, wear - resistant, lightweight and durable.
• According to the human body back movement structure design, fit the human body muscle, scientifically distribute the carrying weight evenly to the whole back, effectively alleviate the pain caused by long carry muscle and other problems.
• High quality accessories: antioxidant zipper head, custom clasp and front clasp.
• Structure: 1 main zipper bag, 3 front outer bags, 1 computer interlayer, 4 inner adhesive bags, 3 pen bags and 2 side outer bags.
• Dimensions: 40L: width--30cm/11.81", height--50cm/19.69", thickness--18cm/7.09"; 50L: width--32cm/12.6", height--55cm/21.65", thickness--20cm/7.87"; 60L: width--38cm/14.96", height--60cm/23.62", thickness--22cm/8.66".