Quatrefoil Duvet Set by Echelon. Brackets duvet cover sets feature a cool graphic print. They're printed on super soft cotton sateen so they're just as comfortable as they are striking! Details: Duvet Set. 300 thread count. Single ply construction. 100% Long staple cotton in a sateen weave. Machine wash and dry. Dimensions: Twin bedding Sham 20 x 26" Duvet cover 70 x 88" Echelon Home offers fine quality Egyptian cotton bedding including sateen, percale and modern prints. Echelon's founders have over 30 years of experience in the bedding world. From yarn size to thread count to construction, Echelon knows sheets back and forth.