I'm pleased that it is a 100% cotton duvet cover.  I purchased this set during our hot summer months and needed something cool and light weight as we slept.  The quality is fine and I do like the buttons at the bottom of the cover which I use to fasten to the adjustable foot railing on our bed so the cover stays in place while sleeping.   I wish the cover was longer/larger to fit a tempurpedic mattress better.  After, several washes the cover has shrunk a bit but it still fits my mattress just not as well as I would like.
Overall, I do like the gray and purple duvet cover set.