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Tyvek is a spunbonded olefin material made by DuPont. It looks and handles like paper but it's not paper. It doesn't tear. It doesn't puncture. It doesn't absorb moisture or delaminate when wet. A standard paper envelope, even 28 lb kraft, will tear under enough force. A Tyvek envelope won't. It will stretch slightly under stress rather than ripping, which means the seal holds and the contents stay inside through whatever postal handling throws at it. At 6 x 9 inches, this is the compact Tyvek format: open-end orientation that loads from the top, peel-and-seal closure that bonds on contact pressure, opaque white surface that conceals contents completely. From Business Envelopes. Free shipping, no minimums.
Tyvek is manufactured by DuPont using a flash-spinning process that bonds high-density polyethylene fibers into a continuous sheet. The result is a material that feels like a slightly stiff paper, tears like no paper you've ever used (which is to say it doesn't), and handles moisture the way a plastic sheet does rather than the way paper does. The fibers are flash-bonded rather than woven, which is why the surface feels smooth and is fully printable while the structure underneath is far more resistant to mechanical damage than any paper-based envelope.
Buyers searching "tyvec envelopes" or "tyvex envelopes" are looking for the same product. Tyvek is the DuPont brand name and the correct spelling, but the material is phonetically spelled multiple ways. Regardless of how you spell the search, this is the DuPont spunbonded polyethylene envelope that resists tearing, puncture, and moisture where paper envelopes fail.
Paper envelopes at 24 lb or 28 lb handle the vast majority of business mailing without issue. Tyvek is the right specification when the contents are irreplaceable, when the delivery conditions are unpredictable, or when a paper envelope has failed on the same mailing before.
Specific use cases where Tyvek outperforms paper: legal and government documents that must arrive intact regardless of handling conditions, medical records and laboratory specimens where moisture exposure would compromise the contents, payroll and check mailings where a torn or opened envelope creates a security problem, architectural drawings and technical documents that can't be reprinted easily, and any mailing going to an outdoor delivery point or a high-humidity environment. The 6 x 9 size handles invoices, correspondence packets, small documents, checks, and any flat-document mailing where the compact footprint is the right format and paper just isn't sufficient protection.
For the larger 9 x 12 Tyvek format for full-size flat documents, see the 9 x 12 Tyvek Peel and Seal. For the 10 x 13 Tyvek format for oversized documents, see the 10 x 13 Tyvek Peel and Seal. For the 10 x 15 Tyvek for the largest flat-document format, see the 10 x 15 Tyvek Peel and Seal. Browse the full Tyvek envelope range for all sizes. Ships same or next business day.
Production Time: Ships same or next day
Shipping Methods: Standard shipping, UPS 2nd Day Air, UPS Next Day Air - Choose at checkout.
It is good for its purpose but I'm not that confident that it is strong enough.
Great quality, useful size