Aeolus Down Sherpa Fleece Quilted Top Down Alternative Filled Fiberbed, King Sherpa Imported Top chamber is cozy Sherpa fleece, quilted and filled with down alternative polyester fiber fill Lower chamber has 3" gusset Baffle Box construction prevents fill from shifting Simple-Fit Skirt fits mattresses up to 18" deep Bottom Fabric is 233 Thread Count 100% Cotton Fill: 3D Polyester Fill, 6 oz. per sq. yard