A sleep sack is like a mini sleeping bag for your baby and toddler. It is a safe alternative for keeping your little one warm, and can also help discourage crib climbing if your child decides to explore the rest of the room! 0.5 TOG, ideal room temperature 75-80 degrees F. The fabric is a blend of organic cotton and Tencel™modal, ensuring that no pesticides or chemical fertilizers were used, and that the processes are sustainable. Available in 3 sizes: NB/9m (20 to 28 in - 7 to 17 lbs), 9/18m (28 to 32 in - 18 to 26 lbs), 18/36m (32 to 38 in - 27 to 33 lbs). Care Instructions: Wash inside out, Wash separately in cold water, Tumble dry low.