Serta Rest - Full - 3 Inch Gel Memory Foam Mattress Topper - 54" x 75" x 3" Premium Memory Foam swirled with Gel for the perfect Balance of Comfort, Support and the optimal Sleep Temperature. Conforms To your body's Contours and Alleviates pressure Points. Provides balanced Support and Less Disturbance From your sleep partner's Movements. Provides Proper Spinal Alignment and Improves circulation.