Queen Medium Firm Hybrid 12 in. Mattresses, Motion Isolation and BreathableErgonomic design; 12 in. mattresses is ergonomically designed, comes with individual pocket Spring system and comfort memory foam offers optimal comfort and prevents back and neck pains Pocket Spring design: this 12 in. hybrid mattress is designed with individually wrapped Springs, each Spring in this mattresses works independently to minimize motion transfer Softness and durability: the 12 in. hybrid mattress comes with a skin friendly knit fabric