double bed shop near me growell beds and furnitures trichy A pocket spring mattress, also known as a pocket coil mattress, is a type of mattress that features individual coil springs wrapped in fabric pockets or sleeves. Unlike traditional innerspring mattresses, where all the springs are interconnected, each pocket spring operates independently, responding to the movement and weight of the sleeper individually. Each coil spring is encased in its own fabric pocket or sleeve. This design allows the springs to move independently of each other, providing targeted support to different parts of the body.