Sam's Club seems to have really good sheets too. Last time I purchased them was last year and they were much better than in previous years. Not sure about the percale thing; I used to look for percale sheets too but don't remember seeing that in recent years. The sheets from Sam's Club have been smooth and pretty much wrinkle-free, soft, and they are deep enough to fit our thick pillow-top mattress even with a gel topper on.