JAM Paper® 9 x 12 Tyvek Tear-Proof Open End Catalog Envelopes, White Airmail, 25/Pack (2131102)

JAM Paper Heavy Duty Tyvek Envelopes are some of the strongest and sturdiest envelopes available. Tyvek is a registered trademark of DuPont, the established chemical company responsible for developing this durable polymer. Tyvek is composed of high-density polyethylene fibers, a synthetic material that is extremely hard to rip and tear. This type of material is the same used to build and insulate houses, so you can be assured the materials inside these enveloeps will be well protected from the elements. The envelopes themselves feature flap with a self adhesive strip closure. They are lightweight, tear proof and water resistant, protecting documents from inclement weather, or accidental spills that can occur around the office. Use them for organizing or mailing important documents at school, home, the office, or out on the go. Envelopes are available in an aray of colors and sizes, so finding one to fit your needs shouldn't be an issue. So if you are looking for that large heavy duty protective envelope, JAM Paper's Tyvek Envelopes are a great option!