The present invention concerns fibres containing a powdered composition that is capable of emitting radiation in the far infrared in turn comprising a mixture of : a) aluminium or alumina, b) titanium metal or titanium dioxide, and/or silica c) at least one metal or a compound thereof selected among: Pt, Pd, Ir, Rh, which, once processed in yarns and woven so as to prepare male underwear, or processed in the form of non- woven fabric, are used for the topical treatment of sexual dysfunction of the male genital apparatus.
