These comforters are made from the wool from spring shearing just before before lambing starts in April. They are made of wool batting covered in 100% cotton unbleached muslin, tied with yarn every 10 inches to keep the wool from shifting. They are designed to have a duvet cover put over them. Wool is non-allergenic and extremely warm, yet these comforters are much lighter weight than a standard wool blanket. They make a humane alternative to industrial down, which nowadays is not coming from the occasional goose your grandmother might have prepared for a family meal! These comforters will last a lifetime and make a wonderful gift for important occasions such as weddings, anniversaries, baby showers or a house warming. Fabulous for Christmas, too!