These are products for professionals that are now available for you. The first product in this series is Ona Pro Gel. As Ona constantly strives to improve products, it has developed a formulation that takes control to a new level. Ona Pro Gel is close to odorless. Although it has a slight scent when sniffed in the container, the final result when working on powerful odors is simply a clean, fresh smellâ€”period. It leaves nothing behind to indicate that any odors were present. Ona Pro Gel is the best product to date and it is all you will ever need.