Summer weight 4 tog duvet 100% Grade A long-fibre Mulberry silk Pure cotton sateen 300 thread count casing Hypo-allergenic, Resistant to dust mites, relief from itchy skin conditions such as rosacea and eczema and also relieve aches and pains caused by such ailments as arthritis and rheumatism. Box and circle stitching keeps the filling evenly distributed Rarely requires cleaning, air outside on a sunny day to freshen up