Briggs & Riley Activate Backpack, Black, One Size 400D lightweight nylon twill fabric resists moisture, wear, dirt and abrasion Durable, soft-touch neoprene handle provides a comfortable grip Adjustable padded backpack straps. Case dimensions: 17 x 12.5 x 7 inches Aerated mesh back padding allows air to circulate against body, keeping back cool Thickly padded back panel provides comfort and lumbar support