Lancôme Définicils – Waterproof Defining & Lengthening Mascara – Black | Lengthen & Define Lashes – With Vitamin B5 – Smudge and Clump-Free – Non-Flaking Formula – Gentle for Sensitive Eyes

Customers find this mascara to be of good quality, with one mentioning it's perfect for fine lashes on both top and bottom. The product receives mixed feedback regarding its water resistance, with some saying it's waterproof while others find it not really waterproof. Customers disagree on the application experience, with some saying it goes on smoothly while others find it difficult to remove and sticky. The product's durability and clumping properties also receive mixed reviews.