The DUO Comfort comes with a 5 Year Warranty. Based on our knowledge and 90 year history of making mattresses your DUO Comfort layers should last between 5 and 12 years depending on many circumstances, while the DUO Support will continue to perform and comes with a 10 Year Warranty. *This mattress is considered a "Custom Product" and does not come with a 100 Night Sleep Trial. It does come with a one Comfort Exchange.