These are a the Bedsure “Get Cozy” sheets — these are 100 polyester. They are “soft and smooth, and, I really liked the material they were made of. It was a much softer material without being a silk sheet. They feel nice on my skin. I ordered California King size and I was hoping the sheets would cover my mattress which has a very thick mattress (about 16”). These did not disappoint. The sheets completely covered my mattress I’m very happy with these and will have to order a few more colors. I recommend these .