If you want to take your makeup to the next level, then an eye pencil such as this is a good choice. One of the features with this eye pencil is that it's waterproof.
Amazon
ARTDECO Soft Eyeliner Waterproof, dark grey green N°22 (0.04 Oz) – creamy consistency that glides onto the eye, smudge-proof & waterproof—extremely long-lasting wax-based formula, eye makeup, kajal