Three layers of comfort and superior body support make the difference. This pad features a top layer of plush memory foam that molds to fit your body's every curve and helps to relieve stress and pressure. The yellow insert adds lumbar support for your waist, lower back and hips to support your spine in its natural position. The blue base gives overall cushioning and ensures that the mattress will not bottom out beneath the weight of your body. Pillow not included. Size Full.