The Weld3 Fight Shorts are the first and only welded fight short created by Hayabusa! Equipped with exclusive Ultrasonic Weld3 Technology, these shorts areÂ developed with a form of sonic welding (thermal bonding) that delivers unmatched strength and zero abrasion. Not only does this innovative construction minimize weight and reduce chafing, but its silicon, non-slip waist ensures that shorts stay securely in place. For those looking to increase performance and experience the ultimate in comfort and maneuverability, Hayabusa Weld3 Fight Shorts are second to none. NOTE: The Weld3 Fight Shorts are a performance fit, please consider sizing up for a more relaxed fit.