Discover silky-smooth brows with the benefit Brows Whoa So Soft Brow Oil. The formula is infused with a range of botanicals for a conditioned feel. n The oil works overnight as a leave-in conditioner for your eyebrows. A nurturing blend of apricot, argan and castor oils nourish each individual brow hair. Hibiscus and safflower extracts deliver soothing properties while adding a shiny finish.