Husband learned what happens when you put pure wool in the wash today

He's a bit crazy about cleanliness so he has a habit of putting things in the wash that don't need to be washed - I just finished a pure wool hat for him less than a week ago and made it very clear that he COULD NOT put it in the wash (he's from Brazil and hasn't owned a wool hat before, so I really stressed how important it was to only hand wash it). His response was something along the lines of "what's the point of it then?" and I responded "it's not time-consuming to hand wash - just let me know when you want it washed and I'll do it for you".

Well, today he put it in anyway (mind you - it did not need to washed yet, I only finished it less than a week ago). He was surprised to see what happened. He feels really guilty about it - gutted really. In the end it's just a hat, so I reassured him that it was fine.

Secretly though, I wish he'd have just listened to me - I really couldn't have stressed it more but he apparently didn't take heed. In a way though it's nice to see how much it meant to him. When I finished it, he said it was the prettiest one I'd made yet which is why I gave it to him. I was actually planning on giving it to someone else, lol.

Maybe I should just use superwash wool and acrylic in the future...

edit: I brought it up later and asked why he didn't listen - part of the reason is that he had machine washed and dried some 100% cotton sweaters that he bought recently and they shrunk a little bit. He was really upset by that too, but I explained that cotton doesn't have much of a memory for size. I soaked them in some lukewarm water with fabric softener and let them hang dry and sure enough, their size was back. So when I explained that wool couldn't be machine washed, he thought it wouldn't change more than the cotton would.

That being said, he does have a habit of thinking he knows best despite my own expertise. I'm not an expert on many things, but I do passionately rant at him a lot about fibers and how they behave and what fibers are good for what. When we shop for clothes, I like to guess the material of random clothes after feeling them, give my reasoning and check the tag after - so he knows I'm an expert but he still thought he knew better. But now at least when it comes to fibers, I think he'll listen now.

Also, some people requested seeing the hat before/after. There's not much of a sense of scale, but the after image is also after my attempts to stretch it back a little. The pattern is lost, but it might fit a young teenager. It's not very pretty though

before - with my ugly face scratched out. unfortunately a blurry image, but it's the only one I took

and after - also after my attempts to stretch it, but it's still too small for him and me and has lost its pattern. You can kinda make them out in some places like the left side