Our 4 inch mattress topper is one of our latest developments with hotel like silver binding , This topper is one of our Firmest firmness toppers and is a great option for a firm mattress to make it softer or to go over a old mattress to give it a new upper layer, four corner straps to hold it in place and machine washable for easy care in the comfort of your own home. - Snug City 10cm Extra Thick Microfibre Soft Touch 4 Inch Mattress Topper in White - Size: King