Human: What is the difference between a duvet cover and a comforter? Assistant: 
The main difference between a duvet cover and a comforter is that a duvet cover is a removable, washable, decorative fabric cover that encloses a comforter, which is a thick, quilted, insulated blanket. The duvet cover provides protection for the comforter and can easily be removed to be washed and changed when desired.