Yes. cot bumpers aren't recommended generally but no one ever seems to be able to put their finger on why - it seems there are lots of reasons.
- if they get their face stuck in it they can't breathe
- they can get caught in the ties
- they can use them to get a purchase and climb
When little they're not recommended because of the face-in-thick-wadding issue, I had one when DS was a little older because he kept getting his head stuck up against the bars of his cot, by then he could move himself out of danger if he couldn't breathe.
From my experience of cot bumpers I would say they are a waste of money! My two never stayed in the same position anyway, and to have had any benefit they would have had to have gone all the way round the cot. I gave up on them as I worried about them getting snuggled into a corner and not getting enough oxygen.
Spend your money on something else! Mine will shortly be going on ebay, once I can get myself sorted to sell stuff!
I used cot bumpers for both of mine from 5/6 weeks old as they would bang their head so hard against the crib bars it would wake us up. I did always make sure the ties were out of the way and the actual bumper was tucked under the mattress so they couldn't get their head under it, and never had a problem. Once they moved into their cotbeds, I still used one for ds but never put dd's on.
They aren't recommended for under 12 months because of the risk of them overheating (it's like wrapping a duvet round their head if they sleep right up against it), then obviously the ties or getting their head stuck under them, then after 12 months they aren't recommended as your LO could use it to climb out. However, it's all about common sense and being careful - it's up to you to weigh up the risks and make a decision.
I used cot bumpers with ds1 once he was moving around all over the cot and kept banging his head and waking up. I was comfortable using them because he was of an age and ability that if he got into difficulties he'd in theory be able to move himself.
I didn't need to use them with ds2 and I am sure it's because the bars on his cot were flat as opposed to round - either that or he was a heavy sleeper and the pain didn't wake him