poly envelopes

Poly envelopes are made from plastic materials, most commonly polyethylene film (a type of plastic). Product listings in the results refer to 'plastic' or 'polyethylene' as the envelope material.

Most poly envelopes use self-adhesive or self-sealing adhesive closures (often described as tamper-evident). Some listings, however, show no closure type specified.

Poly bubble mailers typically provide moisture/water resistance, dust protection, tear and puncture resistance, internal bubble cushioning for shock protection, and seals described as tamper-evident.

Pack quantities vary widely depending on the product — options range from single mailers up to bulk packs of about 250–300 units in the listings.

The listings specify bubble padding heights such as 2/16 inch and 3/16 inch (noted as higher-quality bubble cushioning in some descriptions).

Self-adhesive or self-sealing closures are often described as tamper-proof or tamper-evident in the listings; this means the seal is designed to show visible evidence if the package has been opened after sealing.