Global Art - Universal Series Nylon Portfolio - 23x31 - The Universal Series portfolios are an economically priced series loaded with features generally found in more expensive cases. The exterior is built around a rigid vinyl flex-board and covered with a durable nylon microfiber. Each case includes a full width zippered pocket and a reinforced vinyl gusset with protective feet. On one side of the wide 1.75 inch interior gusset is a clear tool bag and three pockets. The other side has adjustable elastic straps designed to hold full size material in place. This is a unique combination of features at a very affordable price.