Summer duvet: Get a 4.5-tog summer soft like down duvet. Hollowfibre: Made from hollowfibre encased in a soft, channel-stitched cover. Stay cool: Perfect for keeping cosy while staying cool. Machine washable: Machine washable at 30 degrees. Sizing: Choose between single, double, king or super king. 4.5-Tog Summer Soft Like Down Duvet | Living Social