What To Wear Under A BJJ Gi?

Many folks think that buying a regular t-shirt and shorts is enough to wear under their favorite BJJ Gi. Are you one of them too?

Sorry to burst the bubble, an ordinary t-shirt may tear during the hard times of fight. So, you cannot wear it in training.

Now what should you wear, and should you go shirtless? What can be the best option? Don’t get confused! This article will focus on exactly what to wear under BJJ Gi.

With this, let us move ahead and take a look at the different pieces of clothing that you can wear under BJJ Gi.

What Can You Wear Under BJJ Gi?

If you are a man, then the decent thing you should wear under Gi is a Rashguard. Learners wear Rashguards in No-Gi BJJ because of their durability and breathability. Moreover, they preserve your skin from infections. 

Apart from that, they protect your clothes from sweat which enhances their longevity by approximately 50%. You can wear spats or shorts under Gi pants. However, remember that in No-Gi, you cannot wear spats.

On the other hand, if you are a woman, you can wear a rashguard specially designed for women or an athletics bra. Also, under your Gi pants, you can wear spats. However, if you practice in Gi alone, wearing a short-sleeve rashguard is a perfect choice. 

However, in case you practice both, wearing a Rash Guard having long sleeves is a good choice. The long sleeves protect the arms’ skin while rolling.

You can shop these products online. However, in case you do not buy them online, you can get them from your institute or the athletics gear shop nearest to your house.

Now when you consider the second option of going shirtless, what could be the outcomes of doing that? Let’s check them out.

Also read: How To Start BJJ At 30?

What Are The Pros And Cons Of Different Available Options?

If you just started your training, that would be completely okay if you go shirtless under a Gi jacket and not wearing spats or shorts under Gi pants. 

However, as you gain experience and increase your training hours, you must consider the raised risk of receiving a staph infection if you practice while being shirtless every time.

Now let’s get a detailed view of all options available by exploring the pros and cons of each one of them.


As we have told you earlier, there are two types of Rash Guards- long sleeves or short sleeves. Arms are not much in danger in case of a fight. 

However, the weaker part of the body is the chest when you are swiveling with a GI. So to protect that, you can go for a rash guard with short sleeves.


  • Protect The Skin: They protect your skin from the sweat of your opponent and microorganisms present on the mat or opponent’s Gi.
  • Staves Off Bruises: The material used to make rash guards reduce the friction between the mat and your skin, which helps to stave off bruises. Bruises are not a big deal in Gi. However, in No-Gi, you get them more often. So, by wearing long sleeve rash guards, you can protect the skin of your elbows from getting bruised.
  • Reduce The Chance To Develop A Rash: The suction between your body and skin can frequently cause you a mat burn which can further infect you with MRSA or other bacteria like ringworms. 


  • Uncomfortable: Some rash guards can make you think restrictive on the neck and upper arms. In some different circumstances, they can make you lose your chest, neck, etc. It depends on the type of your body and the rash guard you wear.
  • Expensive: A decent rash guard can cost $35 to $60.


Conventional T-shirts that you wear while leaving to the gym can help here too. However, there are few crucial shortcomings.


  • Comfortable: An ordinary t-shirt is very comfortable to wear during the training class.
  • Economical: There is no requirement to spend a buck on t-shirts because everyone possibly has at least five of those, assuming you have them too.


  • Unbreathable: During summer, wearing a t-shirt under a Gi jacket can bring you to believe that you have reached hell.
  • Not Durable: No one wants to ruin beloved t-shirts by sweat and continual friction. So, they lack durability.

What If You Go Shirtless?

Going shirtless is the cheapest and easiest way to go under your gi. However, there are some pros and cons to this:


  • Extremely comfortable
  • Incredibly breathable


  • No protection of the skin.
  • Sweating on the Gi degenerates it timelier.
  • Difficult to avoid the sweat of a fighting partner

Avoid getting into situations that expose the body to the sweating of your fighting partner. 

Also, make sure you do not go shirtless when you possess a hairy chest. It will expose your fighting partners to many harmful bacterias. 

Also read: Elite Sports Gi Review

Fitness Outfit of Women

For women, wearing a rashguard is a must. The next trouble is with Gi pants, as these will slide down accidentally in the middle of the fight. That implies that you also need to wear shorts or spats under them.

Few Quick Tips For Women

  • Do not wear any makeup before trials. 
  • Cut your nails.
  • Do not use hairpins in hair.

All these things will help you protect your jacket from getting makeup stains. It will also save you from getting scratches by long fingernails or any sharp metal items.

However, certain things are there over which you have no control. For example, the cleanliness maintained by your workout companion or the overall hygiene of the gym. All you can do is avoid those people who don’t keep good personal hygiene.

Also read: How To Properly Wash and Dry Your New Gi?

During The Competition

Before taking off to a competition, it will be helpful if you review the rules. As in some tournaments, rash guards are illegal. In others, it is okay to wear them. Laws can differ from competition to competition.

Unlike men, there is a provision for women to wear rash guards under their Gi jackets in tournaments for obvious reasons.

Summing It Up

These are the options that you can consider wearing under your gi jacket and pants, along with a detailed analysis of the pros and cons of each one of them. We hope that this article is helpful in giving you an insight into the clothing of BJJ Gi learners. 

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