I have had a Rogue leather hat for some years now and it's beginning to look like its lived a bit. I don't mind that but I would like to waterproof it. Well, weather proof it because it's a bit like a sponge when it rains
. I use it mainly to keep the sun out of my eyes and the rain off my head and glasses. Wet glasses are a pain.
I would appreciate any advice on the best way/compromise/product, preferably natural, to achieve this. Thanks muchly!

I would appreciate any advice on the best way/compromise/product, preferably natural, to achieve this. Thanks muchly!