TOG is the standard to measure how much heat a garment retains. Sleep bags are labeled with a TOG level to let you know which one you should dress your baby in depending on the season. It’s crucial to understand what TOG is. You need to know the TOG of your baby’s sleepwear, wearable blanket, sleeping bag, or any baby wear that is safe for sleep, so that you can ensure that they can have a safe and comfortable rest.