I made DC some yrs ago by quilting a duvet cover over a 4.5 tog duvet because of their additional needs.
one wash load of all DCs bedding and it dries on the heated airer in a day.
I made 3 for DC so we don’t have to stress about getting it dry and in the winter I rotate. The One in contact with skin gets washed. The one on top become bottom layer and a clean on on top. Still only washing one a week.
its certainly made making the beds 100% easier and DC can do it themselves.