We bought this specific sleeping bag after reading the very good reviews from other parents. The quality of the fabric is very good, it is exactly as it looks, but I really can't understand its usefulness. And I will explain why. The baby is 6 months old, but because we bought it now, we got the 6-18 size so that we can use it for next year as well. The temperature in the house at night is 19-20 degrees, initially according to the instructions on the box, I dressed the baby in a long-sleeved shirt with the feet out. (My pediatrician had told me since the baby was born that I would understand its temperature if it gets cold or warm from its nose, if you see it is cool towards cold, you add layers, if you see it very hot, you remove layers). Based on this, the baby was freezing. I threw a folded blanket on top of him and after a while it was better, but still not very warm. The next day, I dressed him in a short-sleeved shirt over a long-sleeved one and put on his normal onesie and the sleeping bag. Initially, it was warm, around 4 am when he woke up to eat, I picked him up and he was frozen, even his little hands. I completely took off the sleeping bag, covered him normally with his blanket and his little cover, just like before, and in 5-10 minutes the child had warmed up in his face, hands, and nose, and slept comfortably. Note that the first day I put it on him, he was restless, constantly moving and waking up at regular intervals looking for his pacifier, which he does when something is bothering him. I don't know if I am doing something wrong and I am unfair to the product, if any parent knows, please tell me, but I don't see the point of buying a sleeping bag for 50+ euros if the child doesn't stay warm. Our initial thought was to not have the fear of the child being covered by blankets, hence the purchase, otherwise he would stay in his blanket. I consider it not suitable for winter, possibly for spring and beyond if the weather improves, it could be ideal instead of a sheet.