A lot of people are confused about the clothing needed to study martial arts or karate or judo or jujitsu or kung fu. To shed a little light on the subject, it would do well to remember that the clothing was dependent on the environment to a large extent and on the type of martial art studied. Traditional karate was more of a stand up art and not a lot of grabbing or ground game was involved. The martial art gi was therefore not needed to be heavily reinforced or extra thick. This is not to say that the extra thick uniforms were not used just not as necessary for the karate style. Judo and jujitsu is the cross weaved uniform top with the thick collar. This is for grabbing and throwing and overall groundwork. The sleeve width varies with the judo being wider and jujitsu more narrow. Kung fu uniforms were different altogether, the colors were more varied than the normal white, black or tan for karate, judo and jujitsu. Colors ranging from bright reds, blues, yellow and even green are seen on many kung fu gis. The kung fu uniform top generally had frog buttons for a uniform top closure. Frog buttons are a cotton knot with a loop that fasten together. Pants are elastic or tight ankle to ensure that feet don't get tangled up when training.