At the end of the summer I bought new summer sheets for next year but I decided to try them out for a few weeks before I switched to the winter sheets.
I purchased them from a popular online source and I would describe them as very nice, cheap sheets.
I didn’t dislike them and they look sharp but they are slippery. Every night the duvet would try to slip off the bed. Sometimes it succeeded. I would wake up in the night and grab the edge of the duvet from my ankles and yank it way up under our chins to try to keep it up on the bed.
Maybe with a few more washings this feature will go away.