I can not tell you how hard it is to find a winter sleep sack for a one year old that has sleeves. So glad this one does. I just don’t understand the other brands. If it’s cold enough for my kid to need a thicker sleep sack then it’s cold enough to sew some sleeves on it. Highly recommend this one. We have two of them in two different sizes, which is amazing since it’s also hard to find sleep sacks for larger babies. My son loves the two he is using now. At 13 months he’s just not ready for quần áo quân phục bộ đội trẻ em blankets and at 24lbs and 2’7″ tall he’s out grown his summer/fall sleep sacks even though they are sized for 12M. They really aren’t warm enough anyway. Our house gets cold at night and a pair of pjs, socks and his Hudson sleep sack keeps him warm, (but not overheated,) through the night. Would buy again.