A person shall not, at wholesale, retail, or otherwise, directly or indirectly, make, rebuild, repair, renovate, process, prepare, sell, offer for sale, display, or deliver any article of upholstered furniture or bedding, or any filling materials in prefabricated form or loose in bags or containers, unless the article or material is plainly and indelibly labeled. This does not include furniture used exclusively for the purpose of physical fitness and exercise.