Originally Posted by an_aurora
But those do have fabric behind the child.
Originally Posted by pumpkinhead
Between the straps and the child means the straps on top. So if there is fabric underneath the baby, that's "between the straps and the child". So, it's addind extra padding behind the baby which puts them at risk for ejection because the straps won't fit as snugly as they would if the extra fabric weren't there. Everything needs to go on top of the buckle rather than under and over.
First I want to say that I'm 100% with both of you on the theory behind this.
I do wonder though what product in particular the person you both responded to was talking about. Because Kiddopotamus makes both this
that can be used in the car. The swaddling blankets are either one layer of cotton or microfleece, I have one of each and they are both thin enough that there is no risk of compression. I've never used the other product, but that seemed to me to be what the other poster was talking about. They are apparently the same thickness as a fleece snowsuit which would make them no less safe than a fleece snowsuit (assuming you weren't using both) because it's still just that one layer under baby at the back.
FWIW I got one of the swaddle blankets during my pregnancy this time and I was hesitant with the idea of using in the car. Everything I read on c-s.org (where I go for all my answers pretty much
) said they were safe and there were techs using them. Now that I've seen it in use I realize it's really not interfering with the straps in any way.
In answer to the OP question we just use blankets too. And I'm also in Canada, and my big boys don't wear anything more than fleece in the car all through the winter under their straps.