Raw silk is a durable and natural long fiber. It is washed and heat treated for sterilization and goes through a special twisting process to become a strong filament capable of the durability needed for dental use. Beewax has long been used on cleaning products as antioxidant to prevent decaying in ancient time. It is coated on dental floss to add smoothness to the floss. Free of preservatives, bleach, fluorescent agents and artificial flavors.