Hollofil eco duvet the first polyester fibre to meet the requirements of the european eco label which promotes the use of products with a minimum impact on the environmenta 200 gm duvet for the summer and a 350 gm duvet for in between seasons join the two together to form the winter duvet fastened with ties duvet with proneem treatment a treatment using natural biodegradable active ingredients with 100 protection against dust mites lasting e