We bought and were given many baby items, and this has been one of the most used and most useful. It is extremely versatile and we have used it in the car seats - (lie flat and carrier, bouncy chair, swing and the pram. My daughter is nearly 4 months old and has just started to use the outer support only. It is more supportive than the headhugger in her Jane car seat and is excellent in the pram as stopped her rolling and bouncing about. We have used it every day since birth. We haven't noticed any problems with the fabric making her hot.