Just to get technical for a moment, a tog rating is a measure of thermal resistance. Put another way, it is a way of measuring of the warmth of a doona - or in this case, baby sleeping bag or swaddle.
The smaller the number, the lighter (or cooler) it will be and the higher the number, the warmer it will be. The lightest tog we offer is our 0.3 tog Summer Sleeping Bag and the warmest we make is our 3.5 tog Winter Sleeping Bag or SleepSuit Bag.
It's interesting to note, that in Europe, a Summer doona is considered to be 3.0 - 4.5 tog and a Spring/Autumn weight would be 7.5 - 10.5 tog, with a Winter weight being a whopping 12.0 - 13.5 tog!
We send all of our products off to the lab to get tested and rated so that we can be confident we are offering a truly warm (or cool) sleep experience for your baby. Every fabric has different thermal properties, and we have chosen to only use natural fibres as they also help with thermal regulation by offering breathability and preventing sweating - which can cause temperature fluctuations during the night.
To help make life a little bit easier, we created this handy chart, which helps you choose the right product for the Season, and for the temperature in your baby's rooms.