31.5 cm x 45 cm x 15 cm backpack made of Polyester.Main compartment with padded space to carry a computer up to 15.6 inches (35.5 cm high x 26 cm wide x 3 cm deep).Front pocket to improve the organization of small accessories and two side pockets to store the water bottle and umbrella.Reinforced back with wide, ergonomic and padded straps that adapt perfectly to the back to offer the greatest comfort.