Duvet quality is very thin - I’d compare it to a  threaded sheet set quality. I ordered a king size for a queen sized bed to have length down the sides and it worked well with the bedsure all season comforter. The pillow cases are also king size, very large.  The material is very soft. The duvet cover has 3 string ties on each side for stay-in-place security, and to prevent the duvet from shifting.  I use this in a guest bedroom so I am unable to attest to the quality of the ties maintaining placement security.