Genuine Eiderdown Duvet – 700 Loft, 400 Thread Count Cotton Cover, by St GenèveCanadian Eiderdown Duvet Hand crafted in Canada with Canadian down and imported shells. This truly heirloom duvet is the epitome of luxury and function combined. Eiderdown is the softest, most sumptuous down in existence. Eiderdown tests at a loft of 700. Those familiar with loft will recognize this as a typical indicator of good quality, but not necessarily premium quality. The density and cling of Eiderdown supersede loft as an indicator of quality;