18.5 inch backpack 600 Denier Polyester with 3 zipper compartments. Zipper CD pocket, mesh side pocket for water bottle. Organizer with key holder and mesh cell holder on strap. Padded back and padded ergonomic shoulder straps. Dimensions are 18.5 x 12 x 9 inches. You will receive 24 of the color combo you choose. Grey/Black or Grey/Red
