Most poly bubble mailers are made from polyethylene (plastic). Several product descriptions also note that the mailers are moisture- or water-resistant.
Closure styles vary. Many mailers use a self-adhesive or self-sealing strip, while at least some listings show no built-in closure.
Cushioning varies by product. Some listings specify bubble height (for example, 3/16" high-quality bubbles), while others describe an internal layer of plastic bubble cushioning without a stated height.
Descriptions indicate that ink, stamps, and mailing labels adhere easily. You can use permanent markers, stamps, or self-adhesive labels on these mailers.
Some listings note recycled content and recyclability—for example, certain mailers are described as made from 50% recycled content and as being store drop-off recyclable.
Many descriptions advertise water- or moisture-resistance plus resistance to dust, shock, tearing, and punctures. Specific wording varies by listing.
Several listings describe self-adhering or self-sealing adhesive closures that are tamper-resistant or tamper-evident, making it easier to see if a package was opened.
