Quality Park Tyvek Envelopes, 100 Pack, Large 10 x 13 Mailers, 2 Inch Expansion, Rip, Puncture & Water Resistant Self Sealing Mailing Bags for Lightweight Shipping, White

We use these at work for large mailings. They are very sturdy, expand for thick packages and are water resistant.

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.

We have purchased these multiple times for our office and they work perfectly and are less expensive than other brands.

Received on time. quality exceeded my expectation.

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.

I highly recommend this product.

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.