Gold Tyvek Open End Envelopes Size: 10 x 13 inches Quantity: 10 Envelopes per Pack Perfect for business mailing, storage, and organizing documents. 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.

Gold Tyvek Open End Envelopes Size: 10 x 13 inches Quantity: 10 Envelopes per Pack Perfect for business mailing, storage, and organizing documents. 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.