The MLILY WellFlex is an all foam mattress specially designed to ensure a cool, supportive night’s sleep. The layers of memory foam provide added breathability, increased comfort, and extended coolness. WellFlex Series | 12″ 1.0 Firm Ice Cool Fabric Cover AirCell Technology Smart Foam 1. Cooling Knit Fabric 2. AirCell Technology 3. Adaptable Memory Foam 4. Flex Comfort Foam Base