Thanks to some key features of this mattress, the Luxury Silk 2850 is durable and long-lasting. The firm edge support system adds strength to the edges of the mattress, maximising the sleeping area and stopping any side sag from occurring. The three rows of side stitching also help with sagging sides; the stitching creates a more robust border around the mattress and helps keep the fillings in position. Plus, the traditional hand-tufting provides the perfect finish to the mattress and secures the fillings in place. All these features help prolong the mattress's life, though if you're still unsure, Relyon offers a 10-year guarantee with the Luxury Silk 2850.