The Gynecomastia Compress Zipper Vest is designed to provide compression to the chest area to help reduce the appearance of gynecomastia, a condition in which the breast tissue in males becomes enlarged while preventing fat cells from building up in your chest area in the future. Without using any additional energy sources, such as electricity, the Gynecomastia Compress Zipper Vest produces the sense of heat. Its heat-trapping polymer fabric uses magnetic treatment and infrared heating to give users multidirectional chest compression and acupressure stimulation. It successfully stimulates the body's blood and lymph circulation to treat Gynecomastia, lessen fluid retention, and minimize cellulite. What is Gynecomastia? Gynecomastia is a condition in which breast tissue in males becomes enlarged. It is caused by an imbalance of hormones, specifically an increase in estrogen relative to testosterone. While it can affect males of any age, it is most common during puberty and in older men. While gynecomastia is not typically a serious medical condition, it can cause emotional distress and self-consciousness for some males. The use of compression of the Gynecomastia Compress Zipper Vest to reduce the appearance of breast tissue. Classifications of Gynecomastia Gynecomastia (sometimes referred to as "man boobs") is a common condition that causes boys' and men's breasts to swell and become larger than normal. It is most common in teenage boys and older men. Gynecomastia is caused by an imbalance of hormones in the body, specifically an increase in estrogen relative to testosterone. This hormonal imbalance can be caused by a variety of factors, including puberty, aging, certain medications, health conditions, heredity, and weight gain.