Unrippable duvet and pillow to recommend?

[Gooders1105]

Hi all
Looking for advice please.
having to wean my autistic and ADHD 14 year old off guanfacine currently because of world wide shortage. He is becoming more and more manic and compulsive and we’re still at 2mg.
His consultant is being supportive prescribing Risperidone and Fluoxetine to help him sleep.
But he is ripping up duvets and pillows and over night ripped up a new one (a cover less duvet from John Lewis) that I thought unrippable.
Has anyone any experience with safety blankets and pillows? This is what I’m thinking of next but this is getting really expensive now:
https://www.fastasleep.co.uk/index.php/shop-pillow
Would appreciate any advice.
Thanks

Sorry I thought at first you meant the duvet and pillow covers but you mean the duvets and pillows themselves?

Yes. We don’t have covers or pillow cases in his room.
Thanks for taking the time to reply.

Sorry I gave no advice then. Hopefully someone will be along soon who can help

I bought these and they are pretty sturdy. They are also nice and soft and comfy.
anti rip bedding

However ultimately he needed to rip stuff and did manage to rip the pillow. They are not cheap and it was simply causing frustration so I ended up buying disposable sheets and simply keeping his room warm.

Thank you. Really helpful.