Foam-lined mailing envelopes expand on demand for sending larger items. Ideal for mailing photographs, books, CDs, DVDs, frames, artwork, and more. Sturdy protected board mailer requires no cutting, folding, or gluing. Simply place your item in the mailer, seal, and mail. Unique, patented, Expand-on-Demand expansion allows easy mailing of larger items and expands up to 2". Double peel-strip closure offers a more secure seal. Or only reveal one strip to close and make the mailer usable for a second time. Mailer is made of sturdy whiteboard with a protective foam lining.