Corrugated mailers are super strong yet lightweight to save on postage expenses. Perfect for shipping small, lightweight, fragile items. Each corrugated mailer is manufactured from 32ect-B oyster white corrugated. Crush resistant mailers fold to provide double walls of protection on front and sides. Our unique “wave rule” edge virtually eliminates paper cuts. These one piece mailers fold together in seconds. No tape, glue or staples needed. All ship and store flat to save space.