Catalog envelopes are made with DuPont Tyvek so they are strong and moisture-resistant. Release strip makes document easily accessible to recipient, yet maintains security of contents. Convenient peel-to-seal closure requires no moisture to close. Printed "First Class" border gives mail greater attention.
Business Source BSN 65860 DuPont Tyvek 1st Class Envelopes - Document - 12 Width x 15 1/2 Length - Peel & Seal - Tyvek -