This all seasons duvet is ideal for creating a constant feeling of well being with its cover made from cotton and lyocell a plant based fibre that naturally absorbs and wicks away perspiration50 cotton 50 lyocellall seasons a 200 gm duvet for the summer and a 300 gm duvet for in between seasons join the two together to form the winter duvet fasten with tiesthermosoft filling fine and spiralled hollowfibres that allow more air to circulate thereby ensuring perfect insulation