This is a system of steel springs of 1.9 tempered carbon, prepared to secure a more peaceful sleep, without swings and without noise. Unlike the Bonnell springs system, in Pocket Springs System each coil is wrapped in a bag. Thereafter, the springs are glued or stitched to each other in one single place. As a result, during rest, the mattress will provide major support in the lower back, hips and shoulders without forcing any other area of the body. On the other hand, if a person shares a bed with someone, this technology provides maximum individuality, ensuring movements of the other person to be imperceptible. Experience SmartFlex Pocket Springs line and be sure of a healthier individual comfort sleep for your body.