Mattress Coil Type Pocketed Coil. Included Components mattress. Mattress in a box—unbox carefully and allow up to 72 hours for full expansion. Cooling Cover + Breathable Egg-Crate Foam (Not “Stuck” Feeling) A breathable cooling cover and convoluted (egg-crate) foam promote airflow to help reduce heat buildup—comfortable cushioning with an easier-to-move, more breathable feel.