Mountain Hardwear Hilo Messenger Bag Generous interior pocket has 1075 cubic inches of space, meaning you don't have to cut out necessities in order to get it all in to this 19 x 12.5 x 6 messenger bag. Durable 600- and 1000-denier polyester oxford fabric with polyurethane lamination keeps your bag looking new longer. Reflective tape and piping keeps you visible, even in low light situations and the attached key clip and zippered pocket lets you keep your valuables safe and within reach. Padded 15-inch laptop sleeve allows you to keep your digital life in tow without worrying about it becoming damaged. Taped seams keep the water out, even when you get caught in a torrential downpour or heavy spring shower.