The absolute softest sleep sack ever made. My daughter loved this so much. It is my favorite sleepsack that I have ever used on my daughter. It is SO soft and light. It is not tight around the neck and material is breathable. Zipper and buttons. I’m sad to be selling this because I loved it so much!y daughter never got twisted in it because it was roomy. There is a little pulling near the buttons, but so soft even still. The perfect sleep sack.