Martin Pro-2 Art Portfolio, 24.5 x 36.5 x 1.5 Inches, Black, 1 Each (66-PRO2010) A hard-sided portfolio constructed of polypropylene and provide durable, moisture-resistant storage for all your artwork The interior has a full length pocket that is ideal for pads, tool bags and rulers The alternate side has an elastic restraining strap to secure a drawing board or finished work Each portfolio has an adjustable, removable shoulder strap, rubberized, easy-grip handles and black nylon zippers A value-priced portfolio loaded with features