Jiu Jitsu is a martial art that originated in Japan and focuses on grappling and ground fighting techniques. It is often practiced with a gi, which is a traditional uniform that consists of a jacket (coat) and pants.

The gi or jiu jitsu coat is made of a durable and thick fabric, usually cotton or a cotton blend, to withstand the rigors of training and competition. The jacket has a loose fit, allowing for a wide range of movement and the ability to grab and control an opponent.

During jiu jitsu training, the gi is used to perform various techniques such as chokes, joint locks, and throws. It also serves as a tool for practicing defense against an opponent who is wearing a gi. Additionally, some jiu jitsu competitions require competitors to wear a gi, while others allow for submission grappling without a gi.

Overall, the jiu jitsu coat or gi is an integral part of the practice and culture of jiu jitsu, and it represents the tradition and discipline of this martial art.