r.e.m. beauty's brow collection has everything you need to define, enhance, and perfect your brows every single day. from precise brow pencils for effortless definition to the ophthalmologist-tested flourishing lash and brow boosting serum, powered by peptides and vegan biotin to promote visibly longer, thicker brows in as little as 4 weeks. vegan, cruelty-free, and made for every brow shape and style.