Problem of men's underwear:Boxers can be bad, especially for sports, due to loose fitting leading to chafing. Briefs and boxer briefs provide support and tight up. However, they are restrictive and don’t allow body heat to escape–‘Heat can reduce sperm count and testosterone production‘ University of Wisconsin. Solution: Aircon Underwear is from boxer briefs for support while applying “chimney effect” through the right and left creases of the groin and the wearer’s buttock to cool naturally.