The mattress is designed to give you the best of both worlds. The unique combination of two innovative comfort technologies provides universal comfort and support for each unique preference and body type. Premium memory foam conforms and responds to your shape, while supportive fabric-encased Bolsa coils allow for airflow and provide a core support layer. A luxuriously medium comfort knit cover allows you to feel the true support and comfort benefits of this premium mattress. The 12" Medium Hybrid Mattress was designed to provide outstanding comfort and support.