(EO) - essential oils or natural extracts typically from plants and herbs. None of the scents in this selection use chemical fragrances. A great choice for those sensitive to chemical fragrances. (FO) - fragrance oils typically are chemically derived fragrances manufactured to replicate scents. Great for fragrances that can't otherwise be added to products and for those with sensitivities to essential oils. A few puffs of lanolin-rich foam and you are ready to wash your wool covers. This 1.7-ounce bottle will last longer than expected. Lots of lanolin so you don't have to lanolize your covers as often. Gentle foam is easy on your wool items. Fits easily in your purse, suitcase or diaper bag.