Best Mouthguards for MMA and BJJ (2026)
We compared boil-and-bite, slim-fit, and custom mouthguards used across MMA and BJJ. Here are the top picks based on community feedback.
Finding the right mouthguard for MMA or BJJ matters more than most beginners realize. A bad mouthguard makes breathing harder during rolls, slips out during sparring, and can leave your teeth exposed exactly when you need protection. Based on community feedback from Reddit, martial arts forums, and practitioner reviews, we put together this guide to the best mouthguards for combat sports in 2026.
TL;DR: Our Top Picks
| Mouthguard | Best For | Type | Price Range |
|---|---|---|---|
| SISU Aero 1.6mm | BJJ and light sparring | Slim boil-and-bite | $25-30 |
| Venum Challenger | Budget MMA training | Standard boil-and-bite | $10-15 |
| OPRO Gold Braces | Fighters with braces | Orthodontic boil-and-bite | $20-25 |
| Shock Doctor Gel Max | All-around MMA | Boil-and-bite | $10-20 |
| Impact Custom Dental | Serious competitors | Custom-molded | $80-160 |
Why Mouthguard Choice Matters in Combat Sports
Dental injuries are among the most common in combat sports. A 2019 study published in the Dental Traumatology journal found that athletes in contact sports without mouthguards were nearly twice as likely to suffer dental injuries. In MMA, you are dealing with strikes from multiple angles. In BJJ, accidental knee and elbow contact to the jaw happens more often than people expect, especially during scrambles.
Beyond protection, fit affects your ability to breathe and communicate. If your mouthguard is so bulky you cannot breathe through your mouth during hard rolling, your cardio suffers. If it falls out every time you open your mouth, you will stop wearing it.
Types of Mouthguards for Combat Sports
Boil-and-Bite
The most common type. You heat them in boiling water, then bite down to mold them to your teeth. Quality varies enormously. A cheap boil-and-bite from a drugstore is not the same as a well-engineered one from a combat sports brand.
Pros: Affordable, customizable fit, widely available. Cons: Fit degrades over time, bulkier than custom options, some brands are poor quality.
Slim-Fit / Low-Profile
A subcategory of boil-and-bite that uses thinner material (1.6mm vs the standard 3-4mm). The SISU brand popularized this design. They sacrifice some impact absorption for dramatically better breathability and comfort.
Pros: Easy to breathe and talk, barely noticeable in the mouth, remoldable. Cons: Less protection for heavy striking, not ideal for full-contact MMA sparring.
Custom-Molded (Dentist or Impression Kit)
Made from a dental impression of your teeth, either at a dentist’s office or using a mail-in impression kit. These provide the best fit and protection but cost significantly more.
Pros: Perfect fit, maximum protection, excellent breathability for the protection level. Cons: Expensive ($80-300+), cannot be adjusted if your bite changes, longer lead time.
Best Mouthguards for MMA and BJJ: Detailed Reviews
1. SISU Aero 1.6mm — Best for BJJ
The SISU Aero has become the default mouthguard recommendation in the BJJ community, and for good reason. At just 1.6mm thick, it sits close to your teeth without the bulky feel of traditional guards. You can breathe normally, drink water, and talk to your training partners without removing it.
The material is a thermoplastic called Diffusix, which the manufacturer says distributes impact force across the surface rather than concentrating it at the point of contact. It is remoldable up to 20 times if you do not get the fit right on the first try.
Where it falls short: The thin profile means less cushioning for hard strikes. If you are doing full-contact MMA sparring with heavy hitters, this is not enough protection. For BJJ rolling, positional sparring, and light striking, it is excellent.
Community feedback: Consistently the most recommended mouthguard on r/bjj. Users praise the ability to breathe and communicate during drilling. Some report the fit loosening after 4-6 months of daily use.
2. Venum Challenger — Best Budget Option
The Venum Challenger is a no-frills boil-and-bite guard that costs about as much as a fast food meal. It provides solid protection for training and comes with a carrying case. The Nexfit gel frame creates a reasonable custom fit after the boil-and-bite process.
Where it falls short: It is bulkier than the SISU, and breathing through it takes some getting used to. The fit can degrade after a few months. Not the guard you want for competition, but perfectly serviceable for regular training.
Community feedback: Popular recommendation on r/MMA and r/MuayThai for beginners who want decent protection without spending much. Multiple users report buying these in bulk since they are essentially disposable at this price point.
3. OPRO Gold Braces — Best for Fighters with Braces
Training combat sports with braces requires a mouthguard specifically designed for orthodontic hardware. The OPRO Gold Braces model has channels that accommodate brackets without molding tightly around them, which prevents the guard from ripping brackets off during impact.
OPRO is the official mouthguard partner of several professional rugby and combat sports organizations. Their orthodontic line uses the same fitting technology adapted for braces wearers.
Where it falls short: The fit is necessarily looser than a standard mouthguard since it needs to accommodate bracket hardware. This means slightly less retention compared to a guard molded directly to bare teeth.
Community feedback: Recommended across orthodontic and combat sports forums. Users with braces report this is one of the few guards that actually stays in place and does not interfere with their orthodontic treatment.
4. Shock Doctor Gel Max — Best All-Around for MMA
The Shock Doctor Gel Max has been a staple in combat sports gyms for years. It uses a gel-fit liner that molds to your teeth during the boil-and-bite process, with an integrated lip guard that provides additional protection against cuts.
The triple-layer construction (shock-absorbing gel, boil-and-bite frame, and exoskeletal shell) provides more impact protection than slim-fit options. This makes it a better choice for MMA training where strikes to the head are common.
Where it falls short: It is noticeably bulkier than slim guards. You will feel it in your mouth, and talking through it takes practice. Some users report the lip guard is uncomfortable.
Community feedback: Widely recommended on boxing and MMA forums as a reliable mid-range option. Coaches frequently recommend it for beginners because it provides good protection at a low price point.
5. Impact Custom Dental — Best Premium Option
If you are serious about competition or train at a high intensity multiple times per week, a custom mouthguard is worth considering. Impact Custom uses a mail-in dental impression kit to create a guard molded precisely to your teeth.
The process works like this: you receive an impression kit, make molds of your upper teeth, mail them back, and receive your custom guard in about two weeks. The result is a mouthguard that fits like it was made for you — because it was.
Where it falls short: The price. At $80-160 depending on thickness and features, it costs 5-10 times more than a boil-and-bite. If your bite changes or you lose a tooth, you need a new impression.
Community feedback: Practitioners who switch from boil-and-bite to custom guards consistently report they will never go back. The fit, breathability, and protection are all superior. The main debate is whether the cost is justified for recreational practitioners versus competitive fighters.
How to Choose: BJJ vs MMA Mouthguard Needs
The mouthguard that works best for you depends on your primary training activity.
For BJJ Practitioners
BJJ involves less direct striking, but accidental contact is common during scrambles, takedown attempts, and guard passing. A slim-fit guard like the SISU Aero is usually the best balance of protection and comfort. You need to breathe well during 5-7 minute rounds of rolling, and a bulky guard makes that harder.
If you train both gi and no-gi, a low-profile guard that does not interfere with your breathing is especially important during high-intensity no-gi rounds.
For MMA Fighters
MMA requires more impact protection since strikes to the head are the primary threat. A thicker boil-and-bite like the Shock Doctor Gel Max or a custom guard provides the cushioning you need. The slight reduction in breathability is worth the additional protection when someone is throwing punches at your face.
For sparring sessions, many MMA practitioners use a thicker guard, then switch to a slimmer option for grappling-only days.
For Muay Thai and Kickboxing
Similar to MMA, striking arts need thicker guards with good impact absorption. The Venum Challenger or Shock Doctor Gel Max are popular choices in Muay Thai gyms. A slim guard is not enough when elbows and knees are coming at your jaw.
Mouthguard Care and Maintenance
A mouthguard that is not maintained properly becomes a breeding ground for bacteria. Here is how to keep yours clean and functional:
- Rinse after every session. Use cold water immediately after training. Hot water can warp boil-and-bite guards.
- Brush it weekly. Use a soft toothbrush and non-abrasive toothpaste or mouthwash.
- Store it in a ventilated case. Never leave a wet mouthguard in a sealed container or your gym bag. Airflow prevents bacterial growth.
- Inspect monthly. Check for tears, thin spots, and fit degradation. Replace if the guard feels loose or has visible damage.
- Replace every 6-12 months. Even with good care, mouthguards lose their shape and protective qualities over time.
What About Double (Upper and Lower) Mouthguards?
Double mouthguards cover both upper and lower teeth. They provide more protection but make breathing significantly harder. Most combat sports practitioners and organizations use single (upper) mouthguards. Unless your dentist specifically recommends a double guard, stick with a single upper guard.
How to Get a Better Fit from a Boil-and-Bite Guard
The boil-and-bite process seems simple, but many people get a poor fit because they rush it. Here are tips for a better mold:
- Follow the manufacturer’s water temperature and timing instructions exactly. Over-boiling makes the material too soft and creates a sloppy mold.
- Before biting down, suck the guard against your upper teeth to push out air and create a tighter fit.
- Use your fingers to press the guard against the front of your teeth and gums during the molding process.
- Bite with even pressure and hold for the full recommended time.
- After molding, trim any excess material that extends too far back and triggers your gag reflex.
FAQ
Can you wear a mouthguard with braces in MMA?
Yes. Orthodontic mouthguards like the SISU Aero are designed to fit over braces. Avoid standard boil-and-bite guards that mold tightly to bracket hardware, as they can cause damage when hit.
How often should you replace a mouthguard for combat sports?
Replace your mouthguard every 6 to 12 months with regular training use, or immediately if you notice tears, thinning, or a loose fit. Boil-and-bite guards tend to wear out faster than custom-fitted options.
Is a custom mouthguard worth it for BJJ?
For BJJ specifically, most practitioners find a quality boil-and-bite guard sufficient since striking is less common. Custom guards are more justified for MMA or Muay Thai where hard impacts to the face are routine.
Can I use my sports mouthguard from football for MMA?
Technically yes, but football mouthguards are often bulkier and designed for different impact patterns. A combat sports-specific guard will fit better and allow easier breathing during training.
Do mouthguards prevent concussions?
Mouthguards primarily protect teeth, gums, and lips. While some research suggests they may help reduce concussion risk by stabilizing the jaw, this is debated in the sports medicine community. Do not rely on a mouthguard as concussion protection.