Thank you! I will definitely soak the black one to try to prevent dry rot.

What would you guesstimate the value to be on them?

There is not. Both hangtag backs look like this

Found these at Goodwill but can’t find any comps of the gray tank.

Any pricing help for both?

Thanks in advance!

I can’t find this shirt anywhere. I google image searched and searched through eBay and came up empty.