After 3 years of extensive tests and multiple prototypes, the DUO mattress was born as the ideal solution for couples who have different preferences when it comes to comfort levels. DUO is the world’s best customisable mattress for couples, designed by sleep experts! We understand one comfort doesn’t fit all. If you thought bespoke comfort was an expensive choice, think again. The DUO Mattress is a unique dual comfort mattress that allows you to choose the density of foam on each side of the bed in soft, medium or firm.