You need packaging that's going to stand up to tough handling. For decades, shippers in the know have turned to Kraft paper mailers and envelopes to securely send catalogs, plans, contracts and other important mail. Kraft paper, a variant of the same paper used in shopping bags, is a high-strength paper that resists tears and moisture like little else. The rugged 28-lb weight of our brown Kraft withstands rough handling. A full-length pull-and-seal adhesive flap seal holds your items secure in the envelope.