Poly Mailers – 2 Mil Sizes #1 – #8 Choose your quantity from the options above. Highlights Sizes are measured by the inside dimensions (usable space)Water and Dirt Resistant – Product remains untarnished during shipmentSelf Sealing Flap – Strong adhesive provides a permanent seal for added securityHigh Slip Lining – Easier product insertion and extraction means more efficient packingEasy Opening – Reduces labor cost and increases productivityOur high quality lightweight poly mailers are made with a polyethylene outer layer to provide superior tear and puncture protection. Great for mailing a wide variety of items such as apparel, gifts, electronics or documents.