TOG refers to a unit of measurement for temperature control/thermal resistance. It originates from an old slang word "tog," which referred to clothing, and therefore is often used as a standard in the textile/fabric industry. The scale starts at 1 Tog (meaning the item rated is suitable for winter conditions) and goes up to 15 Tog (meaning the item is best used during summer/in warmer climates). The ideal temperature for your nursery sits between 68 to 72 degrees, so keep that in mind when looking at TOG ratings for items you’ll be using in your home vs. outdoors or traveling.