ergoPouch's Cocoon Swaddle Sacks 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 warm 2.5 Tog swaddle can be used on its own in room temperatures between 63 to 73 with no blankets in the bassinet or cot to make this a safe sleep option for a newborn or baby.