A Beautifully Light and Luxurious Duvet with all the warmth you need, combining the softness of cotton with the comfort of down, the lightest of all the fillings, comes from the breast of the bird and its unique ability to trap air makes it exceptionally light. It is also luxurious, soft and fluffy as it doesn't contain feather quills. Made in Ireland exclusively for King of Cotton from 80% white goose down and 20% fine white goose feathers. All our natural duvets are pocketed to prevent cold areas, with 100% cambric cotton double stitched and piped casing. "The All Seasons duvet is composed of two duvets one 4.5 tog for summer, one 9 tog for spring and autumn, in winter simply join them together with the buttons for a very warm 13.5 tog duvet" TOG is a rating system that measures a duvet's ability to retain warmth. The higher the tog rating, the more warmth the duvet will retain.