What is the difference between sateen and percale sheets?

They are two weaves with opposite personalities. Percale is a simple over-under weave that feels crisp, matte, and cool, like a fresh dress shirt, and it breathes well for warm sleepers. Sateen uses a weave with more surface threads exposed, giving a silky, smooth, slightly lustrous feel that is warmer and more draped. Choose percale if you like a cool, hotel-crisp bed, and sateen if you prefer a soft, luxurious, cosier surface.