"Inventor of the pocket spring, Simmons has retained its pioneering role in mattress design. Always at the forefront of technology, Simmons continues to innovate today in the development of new springs and new materials to improve the quality of sleep and to offer you greater choices. Pocket spring: a Simmons invention To make the Simmons mattress so comfortable, in one word: pocketing. This unique technology, patented by Simmons, is the secret of bedding with exceptional comfort. Each spring is individually inserted into a non-woven bag that is hypoallergenic, aerated, bactericidal and strong. Ultrasonically welded, the pocket springs are linked to each other on the sides and not on the surface. A perfect sleeping independence in all positions so that everyone benefits from the sweetest sleep! "