The Ranger T Shirt uses ARGENTIUM technology powered by Polygiene, ensuring you stay dry, protected from the sun & odour free. Features Main Body: ARGENTIUM natural jersey (190 g/sq m) 100% spun polyester ARGENTIUM technology powered by Polygiene Weight: 205g Glossary Polygiene Innovative odour controlling technology using silver salt, a highly effective antimicrobial made from recycled silver, to inhibit growth of microorganisms. Eco-friendly Polygiene is bluesign-approved & on the Oeko-Tex list of approved products. Argentium Argentium is the latest innovation in next to the skin technology which is built to perform no matter what the activity is. This means you can exercise hard & stay fresh for longer. A Berghaus original, which uses silver ion technology for permanent protection from odours.