Mead 40ct No. 10 Security Envelopes Bulk Lot White Office Home 4 1/8 x 9 1/2

Regular mail is at risk of identity theft and check fraud, because a plain white envelope can be seen through by holding it up to light. Mead Security Envelopes have a protective printed lining, and are recommended for mailing checks, sending a business transaction, or even writing a personal letter.