Gel infused memory topper captures and distributes body heat to prevent overheating and improve comfort. Finished with a ventilated design that places hundreds of evenly sized and spaced ventilation holes across the topper to increase breathability and airflow so you can sleep comfortably all night long. Features: gel infused for temperature control superior comfort and pressure point relief compared to traditional memory foam latest memory foam technology after unpacking allow up to 72 hours for topper to fully expand sizes available: twin full queen king packing: compressed and rolled for easy shipping