RÃªverie Nature duvet. The eco-friendly duvet! RecycâFill filling, siliconised polyester obtained mainly from recycled bottles. 100% organic cotton cover (certified by the Control Union Label). Treated with active biocide.Perfect all year round: a 175g/mÂ² duvet for the summer, and a 300g/mÂ² duvet for in-between seasons. Join the two together to form the winter duvet. Fastened with ties.RecycâFill filling made from siliconised hollowfibre, allowing better circulation of air and reducing build-up of moisture. 100% polyester. Hexagonal stitching, strengthened with double stitching. Cotton taped edging. Machine washable at 40Â°C. .