Quality Park Survivor 10x13 Inch Catalog Envelopes made with 18 lb DuPont Tyvek, Expands 2", Peel and Seal Self Seal, White, 100/Box (QUAR4610)

Very sturdy and at a great price. I found this by chance on Amazon. I usually buy it from another online vendor but the shipping costs are so high. I didn't think Amazon would have this product. It is exactly the same as the other vendor's and much cheaper. The Tyvek won't rip so it's sturdy and secure. I will definitely purchase this on Amazon again.

I highly recommend this product.

Useful for corraling stray papers

These were purchased to mail or hand deliver large documents. These are high quality tyvek expansion envelopes.

Nice envelopes. Good quality. Works great to mail odd shape things out.

So happy I found these! Such a good quality and significantly cheaper that the kind we use to use ...we even had some client comment on how they liked the booklet style better.

PERFECT; DELIVERED JUST AS DESCRIBED

Perfect envelopes for the mailing we were doing. Thank you!