Purchased last September and only washed once. My child sleeps well when using this, and I was happily using the S size of the same item. However, since my child started rolling over around two and a half months old, I put this M size away without using it. Cute penguin-patterned 100% cotton swaddle, size M. - Size: M - Design: Penguin pattern - Material: 100% cotton Thank you for looking.