Featuring an 825-coil density system, this supportive mattress offers zoned comfort and pressure relief where you need it—with upgrades available with more cooling layers and support.PillowSoft® Aire Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling designGel Band Support Gel memory foam lumbar support band provides support for the lower back and hips.Custom Support Coil System This 825-coil density system provides contouring, cradling support and minimizes motion transferThreshold delivery: the mattress is delivered into the first door of the address or lobby of an apartment or condo. It does not include haul away or set up.CertiPUR-US® Certified means our foam was tested for and is free from harmful chemicals and gasses