This beautiful duck feather and down bed topper and mattress enhancer is easy to fit with an elasticated strap, which fits around your mattress and secures it in place. With a soft feather & down filling, this is sure to give you a wonderful night's sleep.The premium quality filling is 85% duck feathers and 15% down, which creates a snug feeling, while the box stitching helps to ensure the filling remains equally spread across the duvet.