Most envelopes are made from paper (manila, kraft, or colored paper). Padded mailers pair a kraft-paper outer shell with an inner polyethylene bubble lining for cushioning.
Common uses include: budgeting and cash systems; storing coins and small valuables; seed saving and craft projects; organizing documents; and mailing or shipping small, delicate items (using padded mailers for protection).
Some cash envelopes include a printed ledger on one side for recording spending categories, dates, transaction amounts, and balances—useful for budgeting systems and money-saving challenges.
Brown or kraft paper envelopes are described in the listings as concealing contents for added privacy.
One catalog/clasp envelope lists 20% post-consumer content and 20% total recycled content. Padded bubble mailers are described as made with 100% recycled material.
