The short answer is: none. All pure cotton sheets will wrinkle. How easily your bed sheets wrinkle depends on a number of factors, such as the fibre they are made from or blended with, the type of weave used, chemical treatments used during manufacturing, and to a lesser degree, how you wash and dry them. read more
Cotton-polyester blend sheets are wrinkle-resistant, durable (polyester lasts longer than cotton), and relatively inexpensive (up to half the cost of all-cotton). But if you're looking for that cool, soft feel, nothing beats 100 percent cotton. read more
Keep in mind, though, that organic cotton won’t necessarily make a better sheet (we explain more about this topic in our sheets buying guide). We’ve tested some organic cotton sheets, but none of them beat our favorite sets. read more
Usually cotton/polyester blends don't wrinkle as much as 100 percent cotton sheets, but they aren't as soft or as porous, so you may feel warmer while sleeping. Choose Crisp or Soft Feeling new sheets in the store won't help you figure out how the sheets will feel once they're washed. read more