Say hello to Duo, the all seasons 2-in-1 mattress, which is now the proud owner of a Good Housekeeping Institute approved logo. The Spring/Summer side features a cool-touch fabric, SensICE, to draw heat away from the body and keep you cool during the warmer nights, while the Autumn/Winter sides features a snuggly ‘teddy bear’ fabric, plus wool, to help insulate the body and keep you cosy during the cooler nights.