Rio purest 1.5 inch, 2.5 lb memory foam slab mattress topper/mattress pad. Helps reduce pressure points that cause tossing and turning allowing for a better nights sleep.comes in twn, full, queen, king an cal king. Temperature sensitive foam adjusts to your body temerature. Memory foam eliminates motion transfer. Disperses body weight evenly. Memory foam is hypoallergenic and anti bed bug and dust mite.