Our 15 Tog All Season Duvet consists of two down duvets: The 4,5 Tog Summer Duvet and the 10,5 Tog Autumn Down Duvet, and these can be used seperately or clipped together for extremely cold nights.

This combination is perfect for year round use. In summer, use the 4,5 Tog duvet. As it gets cooler switch to the 10,5 Tog down duvet, and for those very cold mid-winter nights just clip them together with the fitted press studs to make it into an extremely warm 15 Tog down duvet.