Mail Envelopes #15 100 Self-Seal Poly Mailers 15" x 20" x 4" Expansion Shipping

#15 100 Self-Seal Poly Mailers 15" x 20" x 4" Growth and Expands Shipping Envelopes Unlined Expansion Poly Mailers-self-seal.Strong, polyethylene mailers protect products from moisture during shipping. Features a gusseted bottom to allow for thicker items such as binders, books, and catalogs. Puncture, moisture, tamper and tear resistant. High strength seams will keep contents intact even if over packed. The outer surface of the mailer is white, and the inner lining is silver. Labels, ink, and stamps adhere well.Self-seal closure with a double perforation tear strip for easy opening. These strong (2.5 mil) lightweight plastic shipping envelopes are water, puncture, tear and tamper resistant. They are made from 100% recyclable polyolefin plastic.These mailers are USPS, FedEx and UPS approved.Ideal packaging solution for items that don’t require cushioning, such as clothing and other soft goods. Key Features: correspondence, letters, packages, parcels, post a stamp affixed by a Post Office to a letter, parcel, indicating that insufficient or no postage has been prepaid and showing the amount to be paid by the addressee on delivery.