This 37oz (1048 grams) is entirely made of Hutterite duck down. Hutterite ducks have this major asset to live in the open air and to be breed for the exceptional quality of their down. Thanks to the good living conditions of the birds, the Hutterite duck down that fills this duvet gives an exceptional loft power which allows us to say that it is one of the best down in the world. Another asset of the Hutterite down is its ability to regulate temperature. The down will capture the heat your body produces and diffuse it back under your duvet. The gusset that edges the whole duvet is the ultimate innovation from Canada; it allows, indeed, a homogeneous distribution of the down in the duvet. All the duvets available at Luxury Duvet come with guarantees and certificates. You will find several tags attached to your duvet, such as the Canadian maple leaf, that ensures you that the duvet is from Canada, the tag of the Canadian Down Association which certifies that our company is one of its member, the Allernoon 21 tag which guarantees that your duvet has received an anti-microbial treatment and that it resists growth of bacteria and moulds, among others, the last tag reports the batch number of the down that fills your duvet, so that we are able to trace the product.