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: Small Double