To now allow DSs friend over because of pillow fight?

They are Premier Inn ones (didn’t nick them). If you had a pillow fight with them, the person you hit would need facial reconstruction.

Think I’ll now call them Stomper pillows.

I finally found a picture of the stomper pillow!

Well, I’ve been around several decades and never heard of stomper pillows. Google didn’t exactly help either. Now OP explained it, still seems unusual.

OP, surely if these ‘stomper pillows’ are so dangerous in the hands of children, just get rid of them and have standard pillows that don’t hurt people?

I've never heard of a stomper pillow but my ex boyfriend had a pillow that was filled with crushed nut shells so had the weight and feel of one of those fabric door stops. Maybe it's something like that? Meant to be better for the neck I think but weighed a ton and was bloody loud

OP, pillows aside, you can’t bail on a friend at such short notice. I expect your DS was sufficiently shocked by having given his brother a nosebleed that no Rutherford punishment is necessary - and I bet you said something in the moment that made him well and truly aware that he’d done wrong! Just get rid of the sandbag pillows - they sound dangerous!

Also had no idea what a stomper pillow was but I don't think it's fair to cancel the sleepover as it affects someone else as well. The other child will have been looking forward to it. I don't think this is serious enough to cancel.

Irish here and not my understanding of a bolster pillow, usually double width and as mentioned cyclinder shape.

Take them away, kids in the heat of play are not going to differentiate between the pillows! Similar to what I always hear with other peoples kids especially boys when they are 'play fighting', go easy with him you're 2/3/4/5 whatever years older, kids don't register that when the game is on! Even grown men, did you ever see a couple of lads fighting in a pub or wherever, one isn't going ah well now he's 10 yrs older than me I better go easy on him!

I wouldn't cancel sleepover.

I’m Welsh and have never heard of a stomper pillow either.
im wondering if it’s a bolster pillow as someone else has suggested 🤷🏼‍♀️

Nothing to do with us.

Sounds like you’re looking for an excuse to hold host the other child.
Stick to your plans. Don’t be that parent.

Leaving aside the question of "what is a stomper pillow?", this always seems to be a very knee-jerk Mumsnet reaction: cancel a forthcoming, long-awaited treat because of a moment's bad behaviour, often affecting somebody else as well, and the treat is often completely unrelated to the behaviour concerned.
"AIBU to cancel my DD's 13th birthday, because she was rude?"

If you cancel it just like that, he might think "I've got nothing to lose now", and on the evening he would have had his sleepover, he will have no incentive to behave nicely, and is likely to play up further. Maybe using it as a threat for further misbehaviour (and being prepared to follow through) would be a compromise.

What other deadly weapons do you all sleep with?

Are you sure they aren’t meant to be floor pillows then? I’ve had floor pillows which are like they. They are usually square though, and a bit larger but same kind of filling.

So why on earth do you have them on the bed?

Just get rid of them.

Don't cancel the sleepover. That would be so unfair

If you were okay with them having a pillow fight but only with specific pillows, then the offending pillows needed removing. No one on here was clear what a stomper pillow is so it is unlikely a you lad in the thick of a pillow fight is going to identify acceptable and non acceptable weapons. Not the boy's fault.

DH said to just remove the stompers

A glimmer of logic in amongst all this made up 'stomper' name pillow madness...

Why on earth would they be on the bed?!

How old are the boys? This is surely more relevant than the precise definition of a stomper pillow ( which I’ve never heard of either and from the OP’s description sound horrible, neither use nor ornament)!

Bolsters are the cylinder shaped ones; the long round things. OP is talking about normal flat pillows which are just very very hard. No idea what filling those have but they sound like ordinary pillow shaped pillows, not bolsters.

If someone Welsh could clarify that would be great please. We are going on holiday to Wales soon and I need to know whether a pillow fight will just be a bit of a giggle or end with half of us in a coma

This is what Google told me.😂😂😂

Stomper pillows" can refer to a few different things. It could be a decorative pillow with a specific design, like one featuring a "Bug Stomper" character, or a pillow for stomach sleepers, often featuring cooling gel or memory foam. It could also refer to a type of pillow that provides extra support, like a dakimakura (body pillow).

I've had memory foam pillows. They were a bit heavier than other pillows but not by much.

Agree, don’t do this.

I once drove an hour to meet a friend and her child at a park.

After about 15 minutes the child misbehaved and the mum said “right, that’s it, you were warned, we’re going home”…..and left me and my (very upset) child

Another Irish vote here calling them Bolsters.
I vaguely remember my parents having one on their bed when I was growing up in the 1960s. Can honestly say haven't seen one since either in the UK or Ireland.

we were given them by DHs mum. They’re awful I don’t know why we use them

And it has never occurred to you get rid of/not use these pillows that you hate?