Bettli 4x8 Inches Kraft Bubble Mailers Padded Envelopes Pack of 50 Safe and Secure Mailing Option: Size: 4x8 Inch; Useful Size: 4x8 Inch, each pack contains 50 lined envelopes. Whether you are thinking of mailing documents or something else, these padded sturdy envelopes should be your first choice. The envelopes keep your shipment safe from damage and tampering until delivery. The bubble lining provides a layer of padding that normal laminated envelopes dont. Opaque and Lightweight Mailers: These bubble wrap lined envelopes are lightweight and do not add to your shipping costs. They are completely opaque and protect the shipped item from prying and curious eyes. You can mail sensitive documents without fear in these mailers. Eco-Friendly and Tamperproof: The Bettli paper Lined Envelopes are eco-friendly as they are made with recycled Kraft paper yet are sturdy enough to be tamperproof. The seamless bottom and two side finned heat bonded seal ensures enhanced protection of your shipment during transit. Easy to Close Self-Adhesive Seal: The top of the envelopes have a self-adhesive seal that makes the envelopes very easy to seal. Multipurpose Envelopes: These envelopes can be used in offices, at home, in shops, schools and everywhere where there is a need for shipping.