This duck feather and down, single mattress topper is perfect for giving an old mattress a new lease of life or simply making your existing bed even more comfortable. Cosy Duck Feather and Down Our duck feather and down mattress topper will add a soft layer of warmth to your bed and is ideal if your mattress is too firm, a little worse for wear or if you simply want to propel your bedding into new heights of luxury. Baffle Box Construction The baffle box construction technique is used to encase cosy duck feather and down within hypoallergenic, cotton ‘boxes’, ensuring that the filling is evenly distributed throughout the 4cm (1.5”) deep topper. Available in single (90 x 190 cm), double (135 x 190 cm), king size (150 x 200 cm) and super king size (180 x 200 cm), these cosy toppers have fully elasticated skirts so you can be sure that you’ll find the perfect fit. Please note that all measurements are approximate.