This double duvet with genuine new silver duck down from the pyrenees is warm and lightweight breathable and plump4 seasons a 130 gm duvet for the summer and another 200 gm duvet for in between seasons join the two together to form the winter duvet fasten with ties filling 70 down 30 feather 100 naturalcover 100 combed cotton 91 threadscm with water repellent and stain resistant treatmentbox stitch construction squareswhite piped finisheasy care washable at 30100