Designed to suit those who like a firmer support. the Flexisleep mattress is upholstered in a soft Cool Touch stretch knit fabric and contains a robust reflex foam interior. Often found in orthopaedic mattresses, reflex foam has the ability to follow the contours of your body shape and eliminates pressure points on your body when sleeping. It does this by displacing the air bubbles within the foam sideways when your body applies pressure and returns to its original shape when the pressure is removed. It39;s an easy-care, one-side mattress that does not need to be flipped over, but regular rotation from head to toe will enhance its support, comfort and lifespan.