JAM Paper White Tyvek Envelopes offer the most innovative mailing envelopes on the market. With these fantastic, durable envelopes you can mail documents and small items and know that they will reach their destination in pristine condition. Each envelope measures 9" x 12" x 2" and has a smooth finish. Their large size makes them perfect for sending multiple documents and other thick items such as magazines. They have a straight flap and a self adhesive closure so they are both convenient and secure for any type of business mailing need. Tyvek is a registered trademark of DuPont, an established chemical company that develops the powerful polymer used to make these envelopes. At JAM we love paper but we also love the environment, which is why our Tyvek Envelopes are made with 10% recycled sustainable materials. Details:White9" x 12" x 2"Straight flapSelf-adhesive closure250 envelopesTyvek and 10% eco-friendly recycled content