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Do you know where I can find water repellent envelopes for mailing? I have tried asking the post office. ?

I thought the post office would be the answer, but not true. I also tried Walmart. I need these envelopes to mail merchandise to different people in throughout the country.

Any office supply store has Tyvek envelopes. They aren’t completely waterproof but they are water-repellent. They’re also quite a bit more expensive than the traditional manila or paper envelope.

You can also get any number of plastic bags or heat-sealed plastic wrap to enclose the items before you put them in an envelope or box for mailing.

Talk to the employees at your nearest Office Depot or Staples and they can show you what they have. You can also go to someplace like Mailboxes Plus that rents out mailboxes and ask them for suggestions.