Woven from 100% Organic Cotton 270 Thread Count Cotton Percale Long staple cotton fibers offer unparalleled quality and longevity STANDARD 100 by OEKO-TEX® certified. Certificate Number: 15.HIN.75800/ Testing Institute: Hohenstein HTTI; made without the use of harmful chemicals or pesticides Duvet includes button closure and corner ties to keep comforter in place Named "Best Cooling Percale Sheets" by SleepFoundation.org Unlike the sheen and silky feel of sateen, percale offers a cool and crisp hand feel that regulates air flow and improves breathability - even for hot sleepers Made with Green energy using power generated by Windmills and processed with reverse osmosis water purifying method Crafted in India