Helly Hansen Kastrup Thermal Baselayer Pant 75415 Black Mens ideal for high intensity work types that generate excess heat and perspiration. Made from 100% Polypropylene providing superior breathability and quick drying properties. Complete with Lifa technology. 100% Polypropylene 130g, Lifa Stay Dry Technology™. Outperforms any polyester base layer. Keeps you dry and warm in demanding conditions. Extremely quick drying. Weightless feel and with a soft touch finish. Durable, anti-bacterial and non allergic.