Our Cocoon Swaddle Bags are designed to be both easy to use and difficult to escape from. This zip-up swaddle is TOG rated for warmth to keep a baby snug and securely swaddled without the need for complicated wrapping from day one. Being TOG-rated means that the 2.5 TOG can be used on its own in room temperatures between 17-23℃ / 63-73℉ with no blankets in the bassinet or cot to make this a safe sleep option for a newborn or baby. The chest area is 1.0TOG rated to prevent overheating and allow for full chest expansion when breathing.