We have loved this cozy Kyte Sleep sack. It’s in great condition and size Small. Our little girl is now in the medium. 1.0 TOG Please refer to Kyte Baby website for sleep guidelines. Baby's sleep sacks are made from gentle rayon from bamboo fabric that is soft to the touch and provides a cozy and comfortable sleeping alternative to blankets in the crib. The sleep bag has a double zipper that allows quick and easy access for diaper changes and more.