How long will the Duvet Cover last? February 13, 2021 20:13 Updated With normal use and regular washing the Duvet Cover will maintain its soft, durable feel for 5 years or more. Related articles What is the Duvet Cover made from? Does the Duvet insert work with any Duvet cover? Does the Birch Mattress work with adjustable bases? What are the dimensions of the Duvet Cover? Is the mattress pad compatible with other mattress toppers?