Clearance Piranha Gear Black BJJ Gold Weave Kimono We designed these for people serious about grappling arts such as BJJ, Jiu Jitsu, and MMA, but you could use them for Judo, Aikido or any general grappling styles  though they are pretty heavy collars for those arts. Reinforced seams, double layered stress points and knees, and heavy lapel for grappling and the highest quality, long strand cotton fiber (475 gram jacket or 16 oz) for a slightly warmer environment or more humid environments. The pants use a "traditional" drawstring waist via solid cord - no elastic waistband.