0-9 months Barely used as we had a Snoo. Full disclaimer, the weave seems a little looser by one of the fastnings. I’m assuming it’s just because the fabric isn’t a super tight weave. Fourth picture shows this. Made from 100% organic muslin cotton, our Sleep Bags are the perfect summer weight for a peaceful night's sleep. The Sleep Bag Thermal Overall Grade 1 TOG is for room tempatures of 75 - 81 °F , 24 - 27 °C. With 2 layers of muslin, it's both breathable and incredibly soft. It also unzips side to bottom with a zipper for easy diaper changes. Designed for little one's comfort and your piece of mind, we added under-arm snaps in our 0-9 month size to ensure a perfect fit for your growing baby.
  * Organic Cotton * Screen printed by hand using AZO-Free dyes * Ethically Made