One of the features with this is that it's waterproof.
From OnBuy
Chanel Stylo Yeux Eyeliner Wp 928
Notino
Chanel Stylo Yeux Waterproof eyeliner waterproof shade 928 Eros 0,3 g
AllBeauty
Chanel - Stylo Yeux Waterproof Long-Lasting Eyeliner 928 Eros 0.3g for Women