The Silentnight Anti-allergy duvet is filled with innovative DuPont Cortana+ fibres. These special fibres contain anti-allergy treatment which means they help to protect your bedding from the build up of dust mites and bacteria which can lead to allergies. The fibres are also light, soft, bouncy and durable so your duvet can be washed time and time again. Our anti-allergy fibres are approved by the British Allergy Foundation, which means they have the ultimate seal of approval. The 4.5 tog anti-allergy duvet is ideal for warmer summer months and is encased in a soft microfiber cover to keep you relaxed and comfortable throughout the night. The duvet is made right here in the UK and for peace of mind, so you can sleep soundly with your purchase. It is also machine washable at 40°C which means you can keep your duvet fresh and clean for longer. Our anti-allergy treatment does not wash way, so you can enjoy the benefits of this product for many years to come. At Silentnight we understand the importance of a good night?s sleep and this starts with choosing the right bedding. Tog ratings are an indication of how warm the duvet will be when you are sleeping underneath it, so the higher the tog rating, the warmer you will be. We always recommend a low tog for warmer summer months 4.5/7.5 tog and a higher tog for winter 13.5/15 tog. If you would prefer to use only one duvet all year round then a 10.5 tog is most suitable. However, for optimum sleep you should keep your body at a comfortable temperature and changing togs during seasons will help you to achieve this. The anti-allergy collection also includes pillows and protectors for a fresh, clean and comfortable night?s sleep. Silentnight are the UK?s most trusted bed brand with over 70 years? experience in creating products to help the whole family get that ?great sleep? feeling.