Clean, crisp organic cotton is tightly woven into a substantial, 300-thread count percale, creating a smooth and breathable classic for the bed that wears exceptionally well with time. Contrary to the sheen of sateen, percale features a cooler feel that keeps warm sleepers comfortable in any climate, creating better air flow for those who are looking to avoid the discomfort of hot, humid nights. A lengthy 7" hem ensures that the pillowcases and flat sheets maintain their shape year-round.