A description is given of a sanitary towel for physiological liquids comprising as topsheet layer a layer of nonwoven cotton (10) having density which varies transversely and provided with a first plurality of longitudinal lines (1) along which said textile has a higher density of fibres with respect to the rest of the textile, each of said longitudinal lines (1) of said first plurality of lines being alternated with a respective longitudinal line (2) of a second plurality of longitudinal lines (2) along which said textile has a lower density of fibres with respect to the longitudinal lines (1).