I'm amazed how many people think sleeping bags aka Grobags are safe! Just because they're billed as the modern equivalent of old-fashioned swaddling.
Doesn't it occur to anyone that heat will raise the baby's core temperature and trap it, because it can't escape through the neck and armholes - I know babies sleep in the 'surrender' position with their arms eeach side of their head, but it still doesn't leave room for warm air to escape.
Can you imagine the law suits and media frenzy if someone actually compiled statistics on how many cot deaths involved sleeping bags ...
I used sleeping bags with my firstborn, even in the summer as advised, appropriate Tog ratings, appropriate clothing, but she still boiled inside, which I only realised as I picked her up one night (this was winter too) and she was sopping with sweat. perhaps she'd had a nightmare, hence the sweating, she was appropriately dressed and no heating was on in the bedroom..
Actually I think I'll start a thread on this.
I was careful about pillow and duvet use with firstborn, she only had cellular blankets and no pillow in her cot after the grobag incident. I tucked the blankets in tightly on one side of the mattress. To me, it seems more sensible they should be able to regulate their own comfortableness whilst sleeping, if she's too warm she'd kick the blankets off, she isn't going to freeze to death in an adequately heated bedroom if she kicks them off, whereas she might suffer if her covers are NOT removable.
She didn't use a pillow until around 18 months. She's never once slept with her face down into the pillow.
I've never used a duvet with her, she seems to generate too much body heat and duvets are notorious for trapping heat in.
Having said that, my 9 month old sleeps with me under the duvet and he never seems to be overly hot, perhaps each child's temperature control ability is different.