One of our favorite weighted sleep sack since I can remember he loves to sleep with his hands up. Plus he kept waking up because he would startle himself with his movement. So we totally loved this sleep sack mostly importantly he loved it but now we would have to size up because his too big. They have many sizes and he can grow in it. I can definitely say this kept him warm & slept very well. LTKbaby LTKkids LTKbump