The TOG rating that you should use for your baby’s sleep bag in the summer depends on the temperature of your nursery. A TOG rating of 1.0 is appropriate for room temperature of 75 - 81 °F or 24 - 27 °C. If the air conditioning in your home is keeping your baby’s nursery cooler you might find a 1.7 TOG sleep bag more suitable. As the temperature outdoors fluctuates and you make adjustments to the thermostat in your home, you might find that the temperature in your nursery oscilates as well. That’s why it’s a great idea to have a thermometer in your baby’s room so you can track the room temperature and select the right sleep bag for your little one.