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.