Sferra Giza 45 Quatrefoil Bedding. Luxurious duvet covers, sheets, shams and pillowcases expertly crafted from Giza 45 Egyptian Cotton–the most exclusive sheeting from Sferra. The sateen bedding features a classic quatrefoil design inspired by inspired by patterns that date back to the Middle Ages. This collection of bed linens is the epitome of luxury and offers the perfect combination of old and new. Available in White and Ivory.