Our Duck feather and down mattress topper comes with feather and down filling (85/15%) complemented with a feather proof cotton cover for no loss of feathers, double stitched all around and made in a baffle box stitch design for equal filling across the topper. Machine washable for ease of care in the comfort of your own home. four corner straps to hold it in place. Piped all around for that luxurious hotel finish.