A very rugged roll-up pouch constructed of Ballistic nylon, with eighteen pockets of varying width at two heights to accommodate a wide range of contents. Two lower pockets have a mesh cover with a Velcro® brand hook-and-loop closure to hold small or loose items in place. A strip of reflective material is sewn into the back in case you're stuck on the road at night. About 9.5" high by 16" wide when open. Constructed of Ballistic nylon. With eighteen pockets of varying width at two heights. Two lower pockets have a mesh cover with a Velcro® brand hook-and-loop closure. A strip of reflective material is sewn into the back. About 9.5" high by 16" wide when open.