Unives School Backpack, Nylon Water Resistant Casual Travel Daypack 14 Inch Laptop Backpack Lightweight School Bags Knapsack for Teens Boys Girls nylon-mesh Capacity: 15L. Size: 19.7 x 13 x 7 in (L x W x H) Multipurpose: Cycling, traveling, hiking, trekking, camping ,running etc Materials: 5% chinlon,95% nylon. Storage: 1 Main compartment, 2 pockets in front, two side net pockets to hold water bottles. Smart design: The padded sponge of the backpack offer you a good protection and can effectively reduce the burden ,makes your travel easier and more comfortable