Olee Sleep 10 Inch Gel Infused Layer Top Memory Foam Mattress Blue, Twin 93%polyester/7%spandex Quality Medium Firm Mattress - offers ideal level of comfort and support for all sleeping positions. Perfectly balanced to relieve pressure and sleepless nights. Unique Gel-infused Foam Layer  to better regulate temperature. High Density Base Layer  For a longer-lasting and durable mattress. 10-year manufacturer warranty Fast Mattress Delivery  compressed and compact mattress in a box for efficient shipping and handling. Allow the mattress 72 hours to expand for the best results.