Constructed of durable, lightweight nylon and designed for versatile carrying applications, this portfolio is roomy enough for carrying extra project supplies and pads. Fits Alvin PXB Drawing Boards. Extendable length handles become shoulder straps. Third handle provides extra control when using shoulder straps. Features side zippers and Velcro fasteners at top for easy access. 7½" x 9" outside pocket and 1½" reinforced gusset.