Organic Cotton Percale Duvet Covers for King, Queen, Full Twin Quince Cotton Rich Percale Duvet Cover Set Queen Organic Cotton Percale Duvet Covers for King, Queen, Full Twin Quince Percale Duvet Covers Crisp Cool, and Comfortable Bedding RE FINE Emrik Brushed Organic Cotton Percale Duvet Cover Set & Reviews Organic Cotton Percale 400 Thread Count White King Duvet Cover. Stay cool and comfortable with our Queen Cotton Rich Percale Duvet Cover Set. Made from a breathable blend of cotton and polyester, this set has a crisp and cool feel that's perfect for hot sleepers. Striking the perfect balance of breathability and softness, its easy care design minimises ironing, while the quick drying material ensures lasting comfort.