If you love Bobbi Brown's ['Perfectly Defined' brow pencil id847538], this handy refill means you can replace the cartridge or change your shade without purchasing a new vessel. The formula is blended with nourishing waxes and emollients that glide on smoothly and is waterproof, so won't smudge or fade throughout the day. - 'Espresso' is perfect for very dark hair with neutral undertones