Spring core systems for mattresses and upholstery furniture made of spring (steel), spiral (steel), frame (steel), clip (steel), non-woven (PP, PES, PP/PES) in white, woven fabric (CO) in raw white, hotmelt adhesive (PP, PES), sewing thread (PES) in raw white; produced using components partly pre-certified according to OEKO-TEX® STANDARD 100.