Replace your pillows and duvets…Adelman:
Natural filled duvets are breathable and absorb body moisture in the night, releasing it when the duvet is aired. Cared for properly, goose down duvets can last up to 40 years, duck down can last 30-35 years, and feather down duvets have a life expectancy of around 15-20 years.
There is no good evidence for how long most pillows last. Many (though not all) sleep experts say that if you fold your pillow in half and it doesn’t spring open straight away by itself then it’s dead; it can’t support your head and neck, so bin it.Joe Human; Founder of Designs by Human:
Depending upon the quality of the pillow (and allergies), it can vary. I usually instruct our clients to change them out at least yearly for the average everyday pillow. A higher quality pillow or memory foam pillow can be a little longer, between 12-16 months. We recommend changing and washing pillowcases weekly.
Depending on the type and quality, duvets can be kept quite a long time. We wash the covers and the inserts at the change of the seasons for a quick and inexpensive refresh of the room.