This Cocoon Swaddle Bag is designed to keep your baby snug and securely swaddled without the need for complicated wrapping. There are press studs in the armholes that convert this swaddle into your babys first sleeping bag once they are able to roll. 2.5 TOG is suitable for room temperatures between 17-23C. You will receive a FREE thermometer & What to Wear Guide inside this product to help take the guesswork out of dressing your child for sleep.