Made in Lancashire with a 100% British wool filling, this heavier-weight duvet has an equivalent tog rating of 10.5-13.5 tog. Wool is effective at temperature regulation and it's resistant to bacteria, so this duvet is naturally hypoallergenic and will help to keep your body temperature optimised throughout the night. It's encased in a pure cotton cover that's soft and breathable. Good to know As this duvet is made from natural materials, we recommend airing it for 48 hours.