Sateen sheets bear a smoother finish that gives them their signature sheen. They look and feel silky to the touch, and tend to have a lustrous drape that lies a bit heavier on your body. Instead of a cool-crispness, sateen sheets offer a slick, silky smoothness. A sateen weave does produce a thicker, less breathable sheet than a percale weave does, making sateen sheets well-suited to the cooler months. They aren’t quite as warm and cozy as flannel, but sateen sheets tend to be heavier and warmer than percale sheets.