PIXI Natural Brow Duo This Natural Brow Duo from PIXI is a brow pencil and gel combo that can shape and tame your unruly brows in no time. One end of this Brow Duo contains a waterproof brow pencil with an angled tip to give you ultimate application, whilst the other end is home to a tinted soft-hold gel to keep your styled brows in place throughout the day. Now you can achieve super-star polished eyebrows with minimal effort!