The 3.5 TOG Cocoon Swaddle Bag is a zip-up swaddle, used to sleep a baby in, from birth. TOG rated for warmth, the Cocoon Swaddle Bag keeps a baby safe and securely swaddled without the need for complicated wrapping. Being TOG-rated ensures the 3.5 TOG is insulated enough to use in room temperatures between 14-19°C (57-66°F) with no blankets required in the bassinet or cot, making this a safe sleep option for a newborn or baby. The chest area is 1.0 TOG rated to prevent overheating and allow for full chest expansion when breathing. Parents can layer up underneath as needed for warmth, and follow our handy FREE room thermometer and what to wear guide included with the product to help them dress their child appropriately.