Add this Twin XL size 3-inch Thick Ventilated Memory Foam Mattress Topper to a mattress set for increased comfort and sounder sleep. The 3-inch high enhancer enables the user to enjoy the benefits of memory foam without the hefty financial commitment of a new mattress. The enhancer is crafted in ViscO2, a revolutionary, new high performance memory foam. 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 antimicrobial 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 twin XL mattress enhancer measures 78 inches long by 37 inches wide by 3 inches high, and it weighs 14 pounds upon shipping. ViscO2 memory foam combined with ventilation provides the perfect balance of support, comfort and temperature. ViscO2 is a breakthrough in memory foam technology with the same performance as the leading brand, but with 5 times greater airflow to prevent overheating. 3 zones of air channels to allow even more air circulation at the head and feet and more support in the torso area. ViscO2 + ventilation = more oxygen (O2) under the covers for a healthier, more comfortable night’s sleep. Unlike other leading memory foams, ViscO2 returns to its original size faster and is not prone to permanent shrinkage from compression.