The Two-Sided Mattress Double the Comfort, Double the Value As technology advances and trends change so does the mattress industry. While on your mattress shopping journey you will find that most mattresses are now Turn-Free – meaning you don’t need to flip it over. For those seeking more of a classic option yet with newer advanced technology – look no further. Our Innergy2 mattresses collection features all 2-sided mattress that are built the way they used to be – but better! 2-Sided, Flip-able, Reversible – anyway you toss it you have a mattress with extended comfort!