Spring core systems for mattresses and upholstered furniture, made from springs (phosphated, copper-plated), steel coils, frames, and staples, as well as nonwoven fabric made from polypropylene, polyester, and polypropylene/polyester, white, cotton fabric, raw white, polypropylene and polyester hot-melt adhesive and polyester sewing thread, raw white; produced using components partly pre-certified according to OEKO-TEX® STANDARD 100.