4" x 8" Bubble Mailers (8 Colors) Padded Mailing/shipping Envelopes (100 Pack) Durable, Tear Resistant, Waterproof, Flat Poly mailers High Strength Self Sealing Strip -the adhesive will bond and hold for overstuffing Non-tranparent -Privacy for the items you have inside Tamper Evident Packaging -the adhesive seal permanently bonds making opening a deliberate choice Lightweight Packaging -Saves on shipping costs