Yarn (1, 2, 4, 6) comprising a core (8) that comprises a filament (10) that extends along a filament axis (X) and that is at least partially coated by a fluoro-polymer layer (12), a first covering (14) of the core (8), obtained by winding at least one first yarn (16) or a first sliver (18, 18') in a first winding direction, so as to achieve a closed coiling, at least a part of the first yarn (16) or first sliver (18, 18') being incorporated in the fluoro-polymer layer (12) so as to anchor the first covering (14) to the filament (10).