Couldn't afford silk so ordered these. I love them. I've heard that sleeping on cotton is like rubbing your face on steel wool all night since that's how delicate the skin there is.
All I know is I shower and style my hair at night and after sleeping on these, my hair looked freshly blown dry the next morning. I'm not exaggerating, hair looked the exact same in morning as it did after I styled it the night before. So, if this material is that nurturing to my hair I can only imagine how my face is loving it. I'm hooked and will be buying more colors.
Warning: Don't get earings, rings or hang nails anywhere near these or they will snag!