A Jiffy bag, also known as a padded envelope, is a lightweight and cushioned mailing or shipping envelope. Typically lined with bubble wrap or padded material, Jiffy bags provide a protective layer for items during transit. Retailers often use Jiffy bags for shipping smaller and delicate items such as documents, jewelry, or electronic accessories. The cushioning helps prevent damage to the contents, making Jiffy bags a popular choice for mailing items that require a bit of extra protection while keeping packaging weight to a minimum.