JAM Paper® 10 x 13 Tyvek Tear-Proof Open End Catalog Envelopes, Black, 25/Pack (V021376)

JAM Paper® Black 10 x 13 Heavy Duty Tyvek® Open End Catalog Envelopes are made out of smooth, 10% recycled, certified Tyvek material. Tyvek is a registered trademark of DuPont, the established company responsible for developing this durable polymer. It is composed of high-density polyethylene fibers, a synthetic material that is extremely hard to rip and tear. These envelopes feature a jet black color that gives them an appearance suited to both personal and business mailing purposes. This pack contains 25 envelopes. Each one measures 10 x 13 inches in size, making them ideal for enclosing standard sized and slightly larger documents with no need for folding. These envelopes have straight flaps and secure self-adhesive strip closures.