Duvet covers are made up in BOSTON material (100% mercerised cotton jacquard), prewashed WHITE, with a lining of 100% mercerised satin cotton. Fitted sheets and top sheets are in 100% mercerised satin cotton. Pillow slips are 100% cotton. Duvets and pillows have polyester fibre fillings (300 g/m2 for the duvets) DUVET COVERS, SHEETS AND PILLOW SLIPS MAY BE WASHED AT 60° C.