This Travel backpack size is 18.5 * 13 * 9 inches, and has a special pocket that can accommodate a 18 inch laptop. The backpack can be fixed on the trunk rod or can be carried by hand; it uses high-quality water-resistant polyester oxford cloth material and explosion-proof zippers，and strengthens the key points of force, which provide more durable backpack.（NOTE: This travel backpack does NOT CONTIAN Three Custom-Made Storage Bags.