Abstract: The present invention relates to an device for applying a flowing or paste-like product to keratin fibers, comprising an elongate central core (1) extending along a longitudinal axis XX, at least one row of elongate bristles (2) comprising a first end (20) embedded on the core and a second, free end (21), the bristles (2) and the core (1) being made in one piece. According to the invention, at least one of bristles has a flattened shape in a plane substantially perpendicular to axis XX, said at least one bristle being defined in a front view by a first ridge (25) that is continuously convex or concave from the base (20) thereof embedded in the core (1) up to the second end (21), and by a second ridge (26) consecutively concave and convex from the base (20) thereof embedded in the core up to the second end (21), the first and second ridges meeting at the free end (21). The bristles have a slit (24) in the body thereof for defining a first (22) and a second (23) side flank arranged opposite one another.

Abstract: The present invention relates to a device for applying a fluid or pasty product to keratin fibers, comprising an elongate core (1) extending on a longitudinal axis XX. Advantageously, the device additionally comprises at least one pliant and flexible rod (2), which is oriented longitudinally and is embedded, at least at a first and a second point, on said longitudinal core (1), so as to form at least one zone of flexion perpendicular to the longitudinal axis XX; it is made in one piece and preferably from a plastic material.