Enhance the sleeping comfort of a less-than-ideal mattress with the addition of one of these 4-inch thick, ventilated memory foam enhancers. From Sleep Joy, the enhancer enables the user to enjoy the benefits of a memory foam bed without the hefty financial commitment of a new mattress set. The enhancer is crafted in ViscO2, a revolutionary, new high performance memory foam from Sleep Joy. Contrasted with many memory foams which seem to trap heat, ViscO2 permits five times as much air flow to keep the body cool and comfortable. The enhancer’s design further improves head-to-toe air circulation while soundly supporting the torso with its three zones of air channels. In addition to these advances in ventilation and temperature control, the 3-pound density memory foam enhancer provides individualized support, forming to the user’s unique body curves for better alignment and pressure point relief. Likewise, the mattress enhancer minimizes motion transfer so that fidgety sleepers go unnoticed by bed companions. Naturally hypoallergenic, the enhancer also benefits from MicroSafe, an environmentally-safe treatment that combats unpleasant bacterial odors and the growth of mold, mildew, and fungi. The mattress enhancer quickly reverts to its full size and shape after unpacking, and resists permanent compression and shrinkage. Made in the USA, the enhancer is available in twin, twin XL, full, queen, king, and California king sizes. A two-year limited warranty covers this item. This full mattress enhancer measures 73 inches long by 52 inches wide by 4 inches high, and it weighs 24 pounds upon shipping. The ViscO2 4-Inch Ventilated Mattress Topper is made of breathable ViscO2 high performance memory foam that provides pressure relief and enhanced comfort. 3 zone ventilation provides added air circulation for a more comfortable sleeping temperature and support where it's needed most. Returns to its original shape and size right out of the box. Less tossing and turning and reduces motion transfer between partners. Formula uses natural ingredients. Made in the USA.