Most people wear a fitted rash guard or a close-fitting athletic T-shirt under the gi jacket, and compression shorts or underwear under the pants. Women usually wear a sports top and a rash guard. Avoid zips, pockets, and loose cotton, and ask your academy about its customs. Knowing what to wear under a BJJ gi can enhance your comfort, hygiene, and adherence to academy etiquette.
Key Takeaways
- A fitted rash guard or close-fitting athletic T-shirt is ideal under the gi jacket.
- Compression shorts or underwear are recommended under the gi pants.
- Women often wear a sports top and rash guard for added comfort and modesty.
- Academy customs and competition rules can differ, so always check with your academy or event organizer.
- Under-layers can affect gi fit; a rash guard adds little bulk, while a thick T-shirt can make a fitted jacket feel snug.
Table of Contents
- The short answer
- Under the jacket: rash guard or T-shirt
- Under the pants: shorts, underwear, or spats
- What women usually wear
- Warm rooms and cold rooms
- Academy customs and competition rules
- How layers affect gi fit
- Frequently Asked Questions
The short answer
The key is to choose comfortable, close-fitting layers that enhance your performance and adhere to academy customs. A fitted rash guard or close-fitting athletic T-shirt is ideal under the gi jacket, while compression shorts or underwear work well under the pants. Women often opt for a sports top and rash guard. Avoid loose, cotton garments and items with zippers or pockets. Always check with your academy for specific customs and rules.
The layer you choose under your BJJ gi serves multiple purposes. It helps manage sweat, which can become a slippery issue during training, and it maintains mat hygiene by preventing skin-to-skin contact that can spread bacteria. Additionally, a well-fitted layer can prevent the jacket from opening up during rolls, which can be a distraction. Our guide to the best jiu jitsu gi for beginners covers the gi itself.
Under the jacket: rash guard or T-shirt
A rash guard is a popular choice for what goes under a BJJ gi jacket. It provides a snug, breathable layer that wicks away sweat and prevents chafing. Rash guards are made from synthetic materials like polyester or nylon, which are quick-drying and durable. They are a versatile choice for both indoor and outdoor training.
Alternatively, a close-fitting athletic T-shirt can be worn under the gi jacket. These shirts are typically made from moisture-wicking materials that keep you dry and comfortable. However, ensure the T-shirt is fitted to avoid excess fabric that can get caught during training. Loose cotton T-shirts are not recommended as they can become heavy and uncomfortable when wet.
When choosing between short and long sleeves, it often comes down to personal preference and the training environment. Short sleeves are more common and provide better mobility, while long sleeves can offer additional protection from friction and mat burns. A plain, fitted top without zips or prints is the usual choice, as these features can catch on the gi or your training partner's clothing, leading to unnecessary distractions and potential safety issues.
Under the pants: shorts, underwear, or spats
For the lower half, compression shorts or regular underwear are the go-to choices. Compression shorts provide support and keep you cool and dry. They are made from stretchy, breathable materials that enhance your performance. If you prefer more coverage, spats, which are full-length compression tights, can be worn. Spats offer additional support and can be particularly useful in colder environments.
Underwear is another option, especially for those who prefer a more minimal layer. Choose underwear with a snug fit and moisture-wicking properties to stay comfortable during training. Avoid underwear with thick waistbands or zippers, as these can cause discomfort and disrupt your movements.
When selecting what to wear under your BJJ gi pants, it's important to avoid items with pockets, zippers, or loose board shorts that can bunch up and create discomfort. Pockets can catch on the mat or your partner's gi, and zippers can cause chafing or other skin irritations. Loose board shorts can also become cumbersome and interfere with your movements, making it harder to perform techniques effectively.
Groin Guards
Some practitioners, particularly those who engage in frequent drilling, may choose to wear a groin guard. While not mandatory, a groin guard can provide additional protection during intense training sessions. However, it's important to check with your coach and academy, as many do not require or even allow groin guards during regular classes.
What women usually wear
Women often have specific preferences for what goes under a BJJ gi, focusing on comfort, modesty, and support. A sports bra and a fitted rash guard are common choices. The sports bra provides necessary support and comfort, while the rash guard offers a layer of protection and prevents the gi from clinging to the body. Some women prefer to wear a sports top or a tank top under the rash guard for additional coverage. When you compare women's BJJ gis, picture them over the layers you plan to wear.
Fit Considerations
A rash guard keeps the gi jacket from opening too much, maintaining a more modest appearance. A built-in liner can remove one layer: the Women's Everyday BJJ Gi with a liner, for example, is listed as a 450 GSM pearl weave jacket with a rashguard liner and 10 oz ripstop pants. Always check the listing and the size guide to ensure the best fit for your needs.
Warm rooms and cold rooms
The temperature of the training environment can influence your choice of under-layers. In warm rooms, a lighter, more breathable setup is ideal. A fitted rash guard and compression shorts will keep you cool and dry. For colder environments, you might opt for a thicker, more insulating layer. A long-sleeved rash guard and spats can provide the necessary warmth without compromising your mobility.
Bringing a Spare
For long training sessions or multiple rolls, consider bringing a dry spare top. This can help you stay comfortable and fresh, especially if you tend to sweat a lot. A spare top can also be useful for maintaining hygiene and preventing the spread of bacteria.
Academy customs and competition rules
Academy customs and competition rules can vary, so it's essential to be aware of the specific requirements at your training facility and any events you plan to attend. Most academies have their own customs and preferences, which can range from strict dress codes to more relaxed guidelines. Always check with your instructor or the academy's policy document to ensure you are in compliance.
Hygiene Etiquette
Maintaining hygiene is a crucial part of BJJ etiquette. Clean your under-layers and your gi after every session to prevent the buildup of bacteria and odors. Avoid wearing street clothes under your gi, and keep your nails trimmed to prevent injuries to yourself and your training partners.
How layers affect gi fit
The layers you wear under your gi can affect its fit, so it's important to consider this when selecting your gi size. A fitted rash guard adds minimal bulk and should not significantly impact the fit of your gi jacket. However, a thicker, long-sleeved athletic top can make a fitted gi jacket feel snug, so read the size guide and the listing, such as the Beginner Essential BJJ Gi listed as 380 GSM 100% cotton weave, with your usual layers in mind. Similarly, compression shorts or spats can affect the fit of your gi pants, especially if they are tight-fitting.
Washing and Care
Wash your under-layers and your gi after every session to maintain hygiene and extend the life of your gear. Follow the care label instructions to ensure that your clothing remains in good condition. Proper care can help prevent shrinkage and damage, ensuring that your gi and under-layers continue to fit well and perform as expected.
Frequently Asked Questions
Do you have to wear a rash guard under a gi?
While not mandatory, wearing a rash guard under a BJJ gi is often chosen by many practitioners. It provides a snug, breathable layer that wicks away sweat and prevents chafing. Rash guards are made from synthetic materials like polyester or nylon, which are quick-drying and durable. Many academies leave it optional for men in class and some ask for one, while events set their own rules, so check with your coach and the event rulebook.
Can you wear shorts under a BJJ gi?
Yes, you can wear shorts under a BJJ gi. Compression shorts are the most popular choice as they provide support and keep you cool and dry. If you prefer more coverage, spats, which are full-length compression tights, can be worn. Ensure the shorts or spats are snug-fitting and moisture-wicking to avoid discomfort and bulk.
What should women wear under a gi?
Women often wear a sports bra and a fitted rash guard under a BJJ gi. The sports bra provides necessary support and comfort, while the rash guard offers a layer of protection and prevents the gi from clinging to the body. For the lower half, compression shorts or spats are common choices, providing support and coverage. Some women's gis, like the Women's Everyday BJJ Gi, are listed as having a built-in rashguard liner for added convenience.
Do you wear underwear under a BJJ gi?
Yes, you can wear underwear under a BJJ gi. Choose underwear with a snug fit and moisture-wicking properties to stay comfortable during training. Avoid underwear with thick waistbands or zippers, as these can cause discomfort and disrupt your movements. Compression shorts are another popular option, offering additional support and a more streamlined fit.
Conclusion
Choosing what to wear under a BJJ gi is about finding a balance between comfort, performance, and adherence to academy customs. A fitted rash guard or athletic top with compression shorts or fitted underwear is the usual setup, but the specific layers you choose can vary based on personal preference and the training environment. Always check with your academy and event organizers to ensure you are in compliance with their rules and customs. Proper hygiene and care for your gear are also essential to maintain a safe and respectful training environment.
