This feather bed styled mattress topper will enhance the comfort of your mattress with its soft feather and down filling. It is a cassette construction with 5cm outer walls for great lofty comfort. 5% duck down and 95% duck feather. Baffled cassette with outer wall construction. Double stitched for added seam strength. 1 year guarantee. Down proof twill cotton casing. Packaged in PVC. Features: Encased in a down proof twill cotton casing Cassette construction with 5cm outer walls 5% duck down and 95% duck feather Fill Size information: (SINGLE) 91 X 190 (Fill weight 2600gm) (DOUBLE) 137 X 190 (Fill weight 3900gm) (QUEEN) 152 X 203 (Fill weight 4600gm) (KING) 183 X 203 (Fill weight 5400gm)