The Cloud Foam Mattress Topper by Contour® features 3 layers of memory and support foam that provides proper lumbar and spine support while cradling your entire body in comfort. The top layer is plush memory foam and molds to fit your body's every curve, helping to relieve stress and pressure. The topper is ergonomic and orthopedic with an internal layer of support foam that provides extra support to the lumbar region, supporting your waist, lower back and hips which helps to support your spine in its natural position. This topper also boasts a base layer to prevent the pad from bottoming out beneath you. Unlike other foam mattress pads, this one is ribbed to allow air flow ensuring a more comfortable night's sleep, so you can awake feeling refreshed. 2.6 pound rating. 12 firmness rating. 2.5" thickness. Twin topper measures 74.5" x 38" x 2.5". Full topper measures 74.5" x 53" x 2.5". Queen topper measures 79.5" x 59" x 2.5". King topper measures 79.5" x 76" x 2.5". Imported.