This 13.5 tog anti allergy duvet by Slumberdown has been specifically made with an anti allergy filling to help reduce the build up of dust mites, bacteria and fungus. Tested and approved by leading experts at Allergy UK, it's an ideal choice for allergy sufferers and all year round use. Our lovely and snuggly hollowfibre filling is soft and comfortable, and the luxury microfibre cover feels wonderful to snuggle up into - it gently wraps around your body so you can be cosy and still move freely through the night. This 13.5 tog anti allergy duvet is an ideal winter duvet for cooler months, or for those who prefer a warmer duvet.