"Catalog Mailers, Dupont Tyvek, #13 1/2, Squa Flap, Redi-Strip Closure, 10 X 13, White, 50/box | Bundle of 5 Boxes"

Made with lightweight, yet strong and durable DuPont Tyvek material. Tough enough to resist the punctures, tears and moisture that can come with the shipping process. Perfect for shipping smaller products to customers or selling personal items online, lightweight mailing envelopes can reduce postage costs.