Unfortunately not convenient at all!! The baby's hands come out from inside, causing the fabric to swell at the zipper area and reach the baby's face. I don't understand how they can say in comments that it is nice and tight when it says 0-3 months and does not fit well on the baby's body at all. To be tight, I imagine the baby should weigh around 7 kilos, so for a 5-month-old baby, which is almost the weight, you should avoid it!. I tried it about 5 times in two months, it was big and every time I was anxious because I saw her getting nervous and struggling with her hands, which seemed to be forming a circle inside, united with her hands and not being next to her sides. Again, two times in three months, when she is 5 and a half kilos, the same result, no resemblance to the babies in the photo. I don't know if I am being understood by any mom, but unfortunately I regretted spending the money on it and I still use a much cheaper sleeping bag where the hands remain in a straight line, but unfortunately I have to take it off completely for diaper change.