I LOVE our set of Coyuchi organic cotton sheets, but they are pricey. I would have bought more than one set if I'd known at the time how nice they were, and what a screaming deal I was getting. Instead, we just wash the same set and put them back on the bed each week. We use flannel for a little bit in the winter, so the cotton sheets see about 40+ weeks per year of use, and have not shown any wear after 2.5 years. If they make it 5+ years, I'll pay the price to buy another set. The thread count is lower (300?) but they feel nicer, and are much more durable. I've bought cheaper 400-500 TC sheets and they wear in the middle and tear out at the corners quickly. The feel is more satiny, but more prone to tiny pills than these Coyuchi sheets.