The Slimming Body Shaper Under Shirt provides men with a convenient, practical remedy for slimming down the appearance of excess body fat, including visible signs of gynecomastia or "man boobs". These undershirts are made from a high-quality Nylon and Spandex weave for the best wearing experience possible. The undershirt feels tight, yet super soft and breathable, even for all-day wearing. While wearing these compression shirts, the chest and mid-section are flattened to reveal a slim and toned look. Excess body fat is hidden immediately.