Being hot and sweaty is uncomfortable enough ? sweat trapped in your sports bra is even worse. The Cool Guard Sports Bra helps prevent sweat buildup with its moisture-wicking construction and comfortable fit. This is great for karate athletes, because when you wear a gi top, base layer, and bra, there?s going to be sweat, and the last thing you want is a bra that holds onto it. When paired with either Cool Guard or Cool Guard Deluxe inserts (sold separately), the bra meets World Karate Federation (WKF) requirements for female athletes.