Hi Tgordon156,
Yes … you can see my comments about this in two of the posts I linked in my last reply in post #3 here …
and in post #7 here …
Microfiber is usually polyester which would tend to sleep warmer than natural fibers like cotton or “semi synthetic” fibers like viscose rayon which are better at absorbing moisture.
There is more information about sheets and bedding in post #7 here and the other posts and sources of information it links to that should be helpful.
Phoenix