Listings describe constructions using polyethylene/LDPE and some kraft-paper options, with a metallized or metallized glossy exterior on the metallic styles.
Most of the mailers use a self-adhesive, peel-off strip (self-seal) for quick, secure closure.
They typically include internal air bubbles or are lined with 3/16" bubble wrap to provide cushioning during transit.
Descriptions highlight waterproofing, thermal and impact protection; metallized mailers can act as a barrier to moisture, air, and vapors, and some listings also call them tamper-evident.
Available metallic finishes include Black, Blue, Green, Purple, Red, Gold, and Silver, with specific listings noted for purple, gold, and silver variants.
Descriptions vary by listing; some products are described as recyclable after use and are labeled as eco-friendly, while others do not make those claims.
Listings cite shipping DVDs, clothing and t-shirts, odd-shaped items, scarves and accessories, and in smaller sizes, small electronics, glassware, and medication.