Heat-regulated and extremely lightweight, this Quallofil-Air all-seasons double duvet with Allerban anti-bacterial, anti-fungal and anti-dust mite treatment will keep you comfortable all night long. Product Details: • a 175g/m² duvet for the summer, and another 300g/m² duvet for in-between seasons. Join the two together to form the winter duvet (fasten with ties). • trim: made up exclusively of extra-fine silicon hollowfibres, ultra plump and ultra lightweight, 100% polyester, allowing better circulation of air and reducing build-up of moisture. • Cover: 100% cotton. • Cotton taped edging. • Discontinuous stitching. • Care instructions: machine washable at 40°C, tumble dry at low temperature. Treated with active biocide treatment.The active substance is 3- (trimethoxylsilyl) Quaternary Ammonium Chloride.