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A useful and versatile large document storage, the Alvin Portfolios comes in different sizes, forms, and materials. Portfolios are large, thin cases that are designed for carrying large format files such as documents, drawings, photographs, artworks, and many others. They are available in various types including expanding wallet, soft-sided, mesh nylon bag, vinyl envelop, or presentation cases. Durable and made for functionality, Alvin portfolios are ideal for keeping your documents safe and secure.