Even though you have always cared for the bedding products, e. g. you have never beaten of vacuum-cleaned them, the down and feathers will increasingly lose their original resiliency over time which is a natural ageing process.
During the sleep down and feathers undergo mechanical stress for up to 8 hours every day. So they might get crushed. Moreover, they are affected by other factors for instance by sweat which makes them dehydrate. All this is a natural process which you cannot prevent. The shells which are natural products made of cotton might get porous as well in the course of time.
Please, take into account that you use the bedding products day by day, year after year for several hours so that they are stressed considerably. You cannot compare them to normal clothes which you do not wear every day. For restful sleep you should purchase a new pillow or duvet at regular intervals.
Quelle
Verband der Deutschen Daunen- und Federnindustrie e.V.
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