Add a NULL Cover to Your Mattress This traditional mattress pad adds a NULL air layer to any mattress. This mattress pad features a luxurious damask stripe surface and a thin layer of soft down alternative filling. Diamond quilting adds style and durability, preventing the fill from clumping or shifting. This mattress pad adds softness and creates an air layer above your mattress that increases air circulation and breathability to better regulate sleeping temperature. Fits Memory Foam and Pillow Top Mattresses This comfortable and practical SLEEP TITE mattress pad is made with a UNIVERSAL FIT design. Fitted sheet style elastic ensures a smooth, even and secure fit on mattress from 6 to 22 inches thick. Peace of Mind NULL down alternative fill offers the benefits of down without NULLs or NULL. Rest assured knowing this mattress pad includes a 5-year U.S..