Poly-pro Bodywear uses Polypropylene technology which retains heat and releases moisture. The fibres pull moisture from the skin and transport to the outer layer. Recommended for low to medium intensity outdoor activities during cold weather conditions. An antimicrobial treatment keeps bacteria from forming in the garments.A great base layer from Helly Hansen to help you stay warm in all seasons. Uses Polypropylene technology which retains heat and releases moisture The fibres pull moisture from the skin and transport to the outer layer Recommended for low to medium intensity outdoor activities during cold weather conditions An antimicrobial treatment keeps bacteria from forming in the garments Gusset at crotch 100% Polypropylene 240g/m2 Antimicrobial Flatlock seams Brushed, soft inside provides moisture transportation and insulation Double self fabric cuffs Elastic waist Fly front Thermal Quick Dry Style #: Q895 Style #: Q895T