Ditch the basic white envelope and use JAM Paper heavy duty Tyvek open end catalog envelopes instead! Both you and recipients to deliver your mail in style. Recipients will be impressed when they receive this envelope in the mail and find that the contents are in perfect condition. Water and tear-resistant, spills and wet weather won't be able to damage your artwork, magazines, or brochures. This pack contains 25 Tyvek envelopes.Details:Available in multiple colors10" x 13"28 lb/76 gsm25 envelopesWater and tear-resistantOpen-endStraight flap with self-adhesive strip closure10% recycled paper