These models come standard with our fully digital state-of-the-art pump system with built-in Bluetooth to allow smartphone connectivity to the mattress. Under the comfort layers feature an Airlayer™ fabric also creates a breathable mattress cavity, allowing for constant airflow throughout the interior of your mattress and helping to dissipate heat and moisture. Both comfort layers are CertiPUR-US® Certified. The embossed stretch top cover can help keep your body closer to the contouring benefits of the gel infused comfort layer supported by an air flow comfort layer. The A6 has a thicker contouring gel infused comfort layer to help give you a better night’s sleep.