What does tog rating mean?
Generally bags with cotton or synthetic filling will be tog rated, which is a measure of how warm the bag is. Generally the higher the tog rating, the warmer the bag. So a 0.1 tog bag is the lightest bag, suitable for summer and a 3.5 tog bag is the warmest and suitable for winter.
Bags with merino or the Duvet Woolbabe are not tog rated, as the temperature regulating properties of wool means that they can be used in a much wider temperature range and are therefore hard to measure and compare. Merino is also amazing at wicking moisture away from the skin, meaning sweaty babies won't wake up from cold, clammy fabric. Woolbabe bags have the widest temperature range - the 3-seasons bag can be used for rooms 18-28 degrees and the duvet weight bag can be used 14 to 22 degrees. The Duvet Weight Woolbabe with Sleeves is great for rooms under 20 degrees.
If you're on a budget, the Baby Basics sleeping bags are ideal. They feature a cotton lining and outer with a Polyester fill. They're easy to care for and can be tumble dried on low which is perfect for winter. The 3.5 Tog Baby Basics Bag is one of our warmest bags and offers great value for money.
2.5 tog to 3.5 tog bags are all suitable for winter use.