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! 1.5 TOG, ideal room temperature 20-22C (68-72 degrees F). The fabric is the softest Tencel™modal which is not only lightweight, breathable and hypoallergenic, its production process is sustainable, helping to minimize environmental impact. Available in 3 sizes: NB/9m (20 to 28 in - 7 to 17 lbs), 9/18m (28 to 32 in - 18 to 26 lbs). Care Instructions: Wash inside out, Wash separately in cold water, Tumble dry low.