TOG (Thermal Overall Grade) measures how warm a sleep sack or swaddle is. The higher the TOG, the warmer the garment.
The best TOG for your baby depends on their sleep environment, room temperature, and the sleepwear worn underneath. Use the TOG chart below as a guide when selecting the right option for your nursery.
| TOG | Room Temperature |
| 0.5 - 1.0 | 68°F to 77°F |
| 1.5 | 64°F to 75°F |
| 2.0 - 3.0 | 60°F to 72°F |