Supportive and Relaxed: The bed net of the mattress king adopts zoned pocketed wrapped springs, which will make the 12 inch king mattress hybrid more durable and supportive. Thus there will be lasting comfort that stays with you. The medium firm king mattress in a box combine the pocketed spring with the 3 types of foams which will be comfortable enough to make our body totally relaxed. The right mattress lets our body rest. Quiet and Cooling: The coils of the mattress king are all wrapped in a pocket independently. In this way, there will be less motion transfer brought by our partner. Another, pocketed coils design can also keep the 12 inch king mattress hybrid with good air permeability and avoid overheating. Gel-infused memory foam is added below the top fabric. With the motion isolation structure and the cooling material we will enjoy a quiet and cooling night. Safe and Skin-friendly: Avenco mattress king is made with CertiPUR-US certified foam. Both the top and the bottom of the 12 inch king mattress hybrid are coated with the fireproof substances to ensure a quite safe sleeping zone. For the fabric of the medium firm king mattress in a box, there will be added bamboo charcoal components to adsorb harmful substances in the air to a certain extent. It will be skin-friendly and dry for sleepers to enjoy.