The Resistance baselayer comes with an integrated anti-bacterial treatment for odour control during intense workouts, along with specially-designed seams to prevent rubbing for ultimate trail comfort. This long sleeve baselayer is made from 100% Polyester fabric, making it lightweight and quick-drying. It features anti-bacterial treated fabric for odour control and stretchy mesh side panels for extra breathability and freedom of movement. Main: 100% Polyester. Mesh Panels: 88% Polyester/12% Elastane.