Ultra-lightweight, technical base layer anatomically optimized to be worn under outer garments. Comfortable moisture-wicking fiber aids all-round body temperature control and performance. Fully body-mapped with strategically positioned open mesh inserts for ventilation. Seamless tubular construction allows for performance compression fit. Flat-lock ergonomic seams allow unrestricted movement and an enhanced range of motion. 84% polypropylene / 8% polyamide / 8% polyester.