Not a 10 year guarantee as I have found out. It's actually a 5 year guarantee because each year after this period, the cover is reduced by 20% every year. So if your mattress is 8 years and 2 months old like my one, you are now in the ninth year of the guarantee and therefore you would have to pay 80% of the cost for a replacement despite Hypnia accepting my mattress had failed in its quality but only after I sent numerous photos as proof! Also be aware they operate under another company name "sleep tight memory foam" via eBay that hold stock despite Hypnia stating your mattress is made to order. I used to be a fan of Hypnia but when you scratch the surface .............. say no more, you decide !!!