The Dirty Boxer Compression Shorts are created & worn by world champion mixed martial artists. Clinch Fit™ system are utilized in the design to improve comfort & flexibility. Power Hold™ fabrics provide an increased compression for reduced shifting, whilst Strike Vent™ increases breathability to keep the body cool. These shorts are designed for weigh-ins or to be worn over a regular jock strap. Dirty Boxer are a major UFC sponsor & are the number one name in weigh in briefs & compression shorts. Many UFC fighters have been seen sporting the Dirty Boxer brand including Dan Henderson, Randy Couture, Dan Hardy, Clay Guida & many others!