Can two 100×200 mattresses be combined in one bed?

Yes, and this is one of the most distinctive uses of this size. Two 100×200 mattresses placed side by side create a king size sleeping surface of exactly 200×200 cm. This is a smart option for couples who want to sleep in a shared bed but prefer separate mattresses, for example in a split topper setup, so that each person can choose their own comfort level. A split topper placed on top bridges the gap between the two mattresses for a seamless feel.