u/twinaddict

With this ride I usually spend more time like this than actually sitting upright 😆

I have this kangaroo-leather hat which I use a couple of times per year mostly for sun protection on festivals, but I have also worn it at the sea or on boats.

I store it in a breathable, uncoated fabric bag in a cupboard where I also keep my clothing.

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I usually clean it with saddle soap, which originally is intended for leather horse saddles, which I also use to clean and protect my leather shoes. The saddle soap does not only clean, but also protects the leather.

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Btw. my cupboards are mold free and there is also no smell. I always sleep with the windows open and open all windows wide at least twice a day.

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Despite all of that the hat regularly develops this white rash and I don't know if it is mold or just, e.g., salt.

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I have already once soaked it completely in a bucket of water for a longer time in an attempt to wash out any potential salt, from the sea air or sweat. But the white stuff is still coming back.

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Any insights, identification or hints?