https://www.consumerreports.org/cro/news/2013/09/higher-thread-count-doesn-t-guarantee-better-sheets/index.htmI usually get the 600-1200 count , this new one is 900 but I have had more comfortable 600's . We'll see how long it lasts, I like to change mine every week and the ol' lady insist on seasonal stuff. I don't know why because I don't entertain company in the bedroom...... well sometimes I do but the sheets are not important at that point. I mean I have never been turned down because my sheets were out of season.