Duo Lash Comb / Brow Brush Removes Lash Clumps, Grooms Brows, Portable A lash comb and brow brush in a compact travel-friendly tool. Two sides, two different functions. For silky, full looking, clutter-free lashes, use the Lash Comb. For brow shaping and grooming, switch to the Brow Brush. Both fold away when not in use.