Wool-filled duvets are thermal regulators so you sleep warm in the winter and cool in the summer. They and are available in different weights to accommodate our varying seasons. Choose from a versatile an all season duvet, keep it fresh and light with a summer weight duvet or stay warm at the cottage or farm with a snuggly winter weight. Natural dust mite resistance makes a wool duvet perfect for allergy sufferers. We also offer duvets with washable wool for little ones.