Other high quality manufacturers are so expensive they require a membership fee just to see their catalog. (knottyaldercabinets.com)
They have their uses, however; even quality manufacturers use the S - shaped springs in the backs of chairs and sofas because the springs are flat and have a thinner profile. (articles.orlandosentinel.com)
Only truly top - quality manufacturers ensure products that are hypoallergenic so this is an extremely critical point to keep in mind. (danielplan.com)