Polycotton Sateen or Percale, plain or striped… all these different material effects influence the feel and comfort of your flat sheets. Sateen is known to be softer, finer and silkier than percale. However, percale can also be very soft and offer an appealing feel thanks to its tight weave (over 200TC). The most obvious advantage of polycotton is nevertheless its very long-lasting, easy-care qualities.