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Do You Wear Anything Underneath a Rash Guard in BJJ?

If you’re thinking about starting bjj or are newer you may be wondering – do you wear anything underneath a rashguard for BJJ?


For men, no, you do not wear anything underneath your rash guard for jiu jitsu. For women, generally, they wear a sport bra underneath their rashguard.


Key Takeaways

  • In BJJ, you generally would not wear anything underneath your rashguard. However, women will usually wear a sport bra underneath their rashguard.
  • In No Gi training, practitioners will usually wear a rashguard and shorts or spats
  • For Gi training, athletes usually wear a rashguard underneath their gi jacket
  • Lastly, if you are competing in an IBJJF event, they do not allow you to wear a rashguard underneath your gi for competition

Purpose of Wearing a Rashguard in BJJ

In Brazilian Jiu-Jitsu (BJJ), a rashguard is a tight-fitting shirt made from polyester and spandex that is worn during training. The purpose of wearing a rashguard in BJJ is to protect the skin from scrapes, burns as well as providing being moisture wicking while providing compression.

The point of a rashguard is to not have your shirt get in the way of training (especially when compared to training in a regular T shirt)

Overall, the purpose of wearing a rashguard in BJJ is to protect the skin and improve comfort during training. It is a simple but effective piece of equipment that can help to enhance the overall training experience.

Undergarment Preferences for BJJ

When it comes to Brazilian Jiu-Jitsu, wearing proper undergarments is just as important as wearing a clean and well-fitting gi. Undergarments not only provide support and comfort but also help prevent skin infections and protect sensitive areas during training. Here are some undergarment preferences for BJJ:

Compression Shorts

Compression shorts are a popular choice for both men and women. They provide support for the groin area and prevent chafing during training. Compression shorts are also designed to wick away sweat, keeping the skin dry and preventing bacterial growth. Some compression shorts also come with built-in cups for added protection.

They can be worn underneath your no gi shorts, spats or gi pants.

Sports Bras for Women

Women who practice BJJ should wear a sports bra underneath their rashguard that provides adequate support and coverage. It should be made of moisture-wicking fabric to keep the skin dry and prevent bacterial growth. Women should avoid wearing regular bras or those with underwires, as they can cause discomfort and even injury during training.

Athletic Cup for Men

Men who practice BJJ can opt to wear an athletic cup during training.

While many of the people at my bjj gym do not choose to wear a cup when training some still do.

This will likely come down to preference and if you want the enhanced protection during training. An athletic cup should fit snugly and comfortably, without restricting movement. It should also be made of a durable material that can withstand impact.

Hygiene Considerations

Skin Protection

Wearing a rashguard can help protect your skin from mat burns and other injuries. It can also help prevent the spread of skin infections, such as ringworm and staph. This is because rashguards are designed to wick away moisture, which can help keep your skin dry and prevent the growth of bacteria.

Cleaning and Maintenance

To keep your rashguard clean and hygienic, it’s important to wash it after every use.

 When you get in from jiu jitsu training throw it in the washing machine on a gentle cycle with cold water with strong detergents then let it hang dry. However some preshrunk rashguards can be put into the dry on low heat (I prefer to put mine in the dryer since I feel like they get cleaner that way)

Tips for Washing and Care:

  • Do not use bleach
  • Do not use softeners
  • Do not iron
  • Do not wash in hot water
  • Wash the rash guard inside out

This will help remove any sweat, dirt, or bacteria that may have accumulated during training.

Finally, when washing your rashguard, be sure to follow the manufacturer’s instructions. Some rashguards may need to be washed in cold water or air-dried, while others may be able to withstand hot water and machine drying.

Fitting and Sizing of Rashguards

When it comes to wearing a rashguard for BJJ, fitting and sizing are crucial factors to consider. A rashguard that is too loose can get caught on things, while one that is too tight can restrict movement and cause discomfort.

A rashguard should be somewhat tight and fit snug to the body without restricting movement during training.

Rashguards come in different sizes and fits, so it’s essential to know your measurements before purchasing one. Manufacturers usually provide size charts that will help you determine the right size for you. It’s important to note that different brands may have slightly different sizing, so it’s always a good idea to check the size chart before buying.

Selecting the Right Rashguard

When it comes to selecting the right rashguard for BJJ, there are a few factors to consider. Some of the most important factors include brand and quality, design and aesthetics.

Brand and Quality

The brand and quality of the rashguard is an important consideration. It is recommended to choose a reputable brand that has a good reputation in the BJJ community. This will ensure that the rashguard is made from high-quality materials and is designed to withstand the rigors of BJJ training.

Some of the most popular brands of rashguards for BJJ include Tatami, Scramble, and Venum. These brands are known for their high-quality materials, durability, and comfort.

Design and Aesthetics

Design and aesthetics are also important factors to consider when selecting a rashguard for BJJ. While the design of the rashguard may not directly impact performance, it can help to boost confidence and make the wearer feel more comfortable during training.

When choosing a design, it is important to consider personal preferences and style. Some people prefer simple, solid-colored rashguards, while others prefer more elaborate designs with graphics and logos.

It is also important to consider the fit of the rashguard. A rashguard that is too loose or too tight can be uncomfortable and may impact performance. It is recommended to choose a rashguard that fits snugly but is not too tight.

Overall, selecting the right rashguard for BJJ is an important decision. By considering factors such as brand and quality, design and aesthetics, and fit, you can find a rashguard that is comfortable, durable, and helps to boost confidence during training.

Frequently Asked Questions

Is it necessary to wear additional garments under a rashguard in BJJ?

No, it is not necessary to wear additional garments under a rashguard in BJJ. Rashguards are designed to be worn on their own and provide a barrier between your skin and the mat, as well as protection against skin infections.

What type of clothing is recommended for women under a BJJ gi?

Women can wear the same attire as men under a BJJ gi, which typically includes a rashguard and compression shorts or spats with the addition of a sports bra. However, there are also specific rashguards and spats designed for women that offer a better fit and added comfort.

How should a rashguard fit for optimal performance in BJJ?

A rashguard should fit snugly against the skin without being too tight or restrictive. It should also be long enough to reach the waistline of your shorts or pants and have a high neckline to provide full coverage. A properly fitting rashguard will help prevent chafing and irritation, as well as provide the necessary compression for optimal muscle support.

What are the best practices for choosing attire for BJJ training?

When choosing attire for BJJ training, it is important to prioritize comfort, durability, and fit. Look for lightweight, breathable fabrics that will wick away sweat and keep you cool during training. Choose garments that are specifically designed for BJJ and provide the necessary compression and protection. Finally, make sure your attire fits properly and allows for a full range of motion.

    About the Author:

    Zack Nicholas

    Zack Nicholas:

    Zack is an avid jiu jitsu practitioner and weight lifting nerd. When not on the mats or in the gym, he can be found going for walks with his wife, attempting (and often failing) to train his dog, and frequently obsessing over a specific hobby only to forget about it a week later. He can be reached over his LinkedIn or at info@heavybjj.com