These luxurious 90% pure Danish Duck Down anti-allergy duvets are encased in exceptionally fine down proof and dust mite proof 100% cotton fabric. They are the perfect solution for allergy and asthma sufferers, offering "warmth without weight" as they contain mostly down, not feathers, and superb drape ability so that the entire quilt snuggles around the body. These anti allergy duvets give fantastic insulation, being neither too cold nor too hot. The super light down ensures an even fill which ensures the elimination of "cold spots". The feathers are sourced from Ringsted Dun's own feather factories in Denmark, where the hygiene standards are second to none, ensuring that your duvet is the most sterile and eco friendly product available. In addition to all this, these duvets are fully washable!