1.0 TOG Sleep Sack: Room Temperature and What to Wear

A 1.0 TOG sleep sack in the Baby Layers app: for a room of 21–23°C. What goes under it, by age, and how it compares with the makers' charts.

A 1.0 TOG sack is for a room on the warm side of comfortable. In the app it comes up for a room of 21–23°C, over a short-sleeve bodysuit.

21–23°C: short-sleeve bodysuit.

The sack makers' charts give 1.0 TOG for a room of 21–23°C. The safe-sleep charities point to those charts, and your sack's own label wins over any table.

Baby Layers follows the charts here.

0–3 months: 21–23°C. 3–6 months: 21–23°C. 6–12 months: 21–23°C. 1–3 years: 20–22°C.

Warmer than 23°C: a 0.5 TOG sack over short-sleeve bodysuit.

Cooler than 21°C: a 2.5 TOG sack over long-sleeve bodysuit.

Never a hat for sleep — a baby cools through the head.

A sleep sack, never a loose blanket.

Safer slightly cool than too warm: nothing makes the sack warmer than the chart.

Check the neck — warm but not sweaty means just right.

Sources

What temperature is a 1.0 TOG sleep sack for?

In the Baby Layers app, a room of 21–23°C. The makers' charts give 1.0 TOG for 21–23°C.

What should a baby wear under a 1.0 TOG sleep sack?

21–23°C: short-sleeve bodysuit. Nothing goes on top of the sack: it is the whole of the bedding.

Is a 1.0 TOG sack all right for a newborn?

The chart is the same from birth to a year, and the app never dresses a newborn warmer than it for sleep. A swaddled newborn wears the swaddle in the sack's place, until the first signs of rolling.