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 smell—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.