The socks also offer optimal moisture and odour management thanks to Polygiene technology. This treatment, which uses naturally occurring silver salt microparticles, prevents bacteria from spreading and growing, reducing odours from strenuous activity. The socks stay fresh and last longer (guaranteed to last at least 100 washes). Polygiene fibres have been tested by laboratories and are completely safe for the skin. Technical characteristics In & Out construction (wireless) Reflective tape Ankle protection Polygiene technology for odour and moisture management 2 anti-slip grip strips Metatarsal and heel strapping Large toe box