Quality Park Survivor Lightweight 14 lb Tyvek Open End 1.5" Expansion Mailers, 13 1/2, Square Flap, Redi-Strip Closure, 10 x 13, White, 25/Box

We use these every day at work. They are sturdy and durable. We have ordered these before and will continue to order these for the office. It's a good saving on the value.

The Survivor brand of Tyvek envelopes has been a sturdy, water-resistant option for mailing important documents.

I had gone through a box of these in the past year or so so I restocked on them. I love the toughness of the material these are very sturdy and light envelopes excellent for mailing anything that will fit in them.

The media could not be loaded. It’s everything I expected out of a Tyvek envelope. Solid color, not gonna rip, does the job. I specifically got these to mail soft items, so the tackiness of the sealing strip is important- the adhesive could definitely use a little more “stick” for mailing purposes, but does the job well for non- mailing. (I will be adding tape for shipping.)Seals easily. Arrived in good condition, in a sealed box.Would order again if I continue to need this size envelope.

I have used Tyvek envelopes for many years for mailing items that will fit into them. They are very sturdyand easy to use.. They are also less expensive to use that the padded envelopes.

These have gusseted sides for expansion and are heavy duty and light weight, they fit in my file cabinet folder without sticking up, because they have give.

Great product!

Great price!I have used Quality Park envelopes for years. Never use anything else. They are so durable, even if I ship books. They are very strong!!!