50 BLACK MAILING ENVELOPES LIGHT WEIGHT MAILERS - This pack of 50 4x8 inch padded envelopes is made of heavy duty plastic, fashionable design. Padded mailers are lightweight mailing envelops. CUSHION MAILERS - These mailer envelopes are lined with 80gsm bubble, with unique air cellular layers and 360strong air bubble technology helping absorb shock during shipment. This can provide effective shipping protection for your products. SELF SEALED ENVELOPES - These bubble mailers come with a self-adhesive tamperproof seal. The adhesive on the fold-over flap is strong enough. There's no need reinforcement tape and it doesn't come apart unless you tear it up. MULTIPURPOSE ENVELOPES - These envelopes can be used in offices, at home, in shops, schools and everywhere where there is a need for shipping. And the bubble envelopes feel nice to the touch and are perfect for handwriting, labeling and stamping. FREE - FAST SHIPPING FREE RETURNS Thank you so much for visiting!