The lightest undershirt we've ever made, designed for ultra strenuous sports activities with heavy perspiration. Weighing just 80 grams, it boasts the highest concentration of transpiration technologies. Holes of different diameter positioned in specific areas of the shirt, three-dimensional micro-ribbing and the combined use of polypropylene generate an extraordinary flow of air on the skin. Excess body heat is dissipated immediately, without any negative impact on athletic performance.