The Hoppediz sleeping bag is the first in which there was no apparent accumulation of heat! Finally, he is no longer sweating wet. I think it is because here no polyester was processed. Inside, the sleeping bag only roughened cotton. when it's really cold, still fits a thick pajamas underneath.
The neck is super, and the zip, which leads all around is great!
The sleeping bag is one size larger, my friend, I have a concern in 44/50 for her newborn, which fits perfectly. I guess he is one size larger.
We find it great and buy no more, it is available even for large sizes.