Purel-PureLifestyleWonders brings you the Celtius luxury down duvets made of Danish Duck Down and encased in 100% dust mite proof cotton fabric. Because you can't always get the sleep you need, you should strive to make the most out of the sleep you do manage. Nightly temperature fluctuations may interrupt your sleep causing you to wake up completely unrested. The Celtius down quilt is adjusted to the perfect body temperature and hence preserving the optimum sleeping temperature. The Celtius luxury down quilt is equipped with a temperature regulating effect combining the unique properties of the down with those of the Phase Change Material (PCM). Consequently, the material absorbs surplus heat when you sleep and releases it when your body temperature falls. As the temperature rises, the built-in microcapsules react by absorbing the heat. The Phase Change Material in the microcapsules will melt. They attract heat from their surroundings and will store the excess energy. As the temperature falls, the capsules will release the stored heat. Consequently, the PCM in the microcapsules will solidify. With its 100% dust mite proof cotton encasing, the duvet offers a perfect solution to the allergy and asthma sufferers. They are also fully washable. All the fills used are a by-product of the poultry industry only. The feather and down are harvested only from mature ducks and geese that are by-products of the poultry industry. All fills and fabrics are tested by independent hygiene laboratories to further guarantee safe and healthy products. Our Duck & Down feather bedding has the Nomite, Oeke-tex 100 & 1000, Class I -EN12934 & EN12130 certifications. It is guaranteed to be compliant against child labour, discrimination and slave labour. With our duvets, you cannot go wrong.