🛡️ Gear Guide · April 2026
Why Sisu Is The Best Mouthguard for BJJ & MMA
Ultra-thin at 1.6–2.4mm, 90% injury reduction, and you can actually breathe. Here is why serious grapplers and fighters choose Sisu.
📅 April 2026 · ⏱️ 8 min read · 🥋 BJJ · MMA · Combat Sports
Why Your Mouthguard Is Non-Negotiable
Ask any grappler who has taken an elbow to the face mid-scramble what they wish they had been wearing. Ask any MMA fighter who has spit blood after sparring. A mouthguard is the single piece of protective gear most likely to save you from a $5,000 dental bill — and most likely to be forgotten in a gym bag.
The problem? Most mouthguards are terrible. They are bulky, they make you drool, you cannot breathe properly, and you sure cannot talk to your training partner. So people stop wearing them. And then someone takes a knee to the mouth.
Sisu changed that. At 1.6mm to 2.4mm thin, Sisu mouthguards are 50% thinner than conventional boil-and-bite guards while providing superior impact protection. At Element Fight Wear, we stock the full Sisu lineup because it is the only mouthguard technology we have found that serious grapplers will actually wear every session.
What Makes Sisu Different
Ultra-Thin Design
Traditional mouthguards are 4–5mm thick. Sisu starts at 1.6mm. That thinness is not a weakness — it is the result of a different material technology.
Diffusix Technology
Sisu uses a perforated thermoplastic material with Diffusix engineering. When impact force hits the mouthguard, the perforations distribute the force across a larger area rather than transferring it directly to your teeth. This is the same principle car crumple zones use — spread the energy out.
Breathe, Talk, Drink
The combination of thinness and perforation means you can breathe through the mouthguard, communicate with your partner clearly, and even drink water without removing it. For BJJ specifically — where you are constantly communicating (“tap”, “ok”, “go lighter”) — this matters more than in striking sports.
Remoldable Up to 20 Times
Unlike single-use boil-and-bite guards, Sisu can be remolded with hot water up to 20 times. If the fit is not perfect the first time, reheat and remold. If your dental work changes, remold.
🦷 The Dental Bill Test
A chipped tooth costs $300–$1,000. A cracked tooth needing a crown: $1,500–$3,000. A lost tooth with implant: $4,000–$6,000. A Sisu mouthguard: $19.99–$29.99. Do the math — not wearing a mouthguard is the most expensive decision in your training life waiting to happen.
The Sisu Range at Element Fight Wear
🟢 ENTRY — LIGHTEST
Sisu Aero Mouthguard
- 1.6mm ultra-thin — lightest in the range
- 50% thinner than conventional mouthguards
- 8x greater tensile strength than standard mouthguard materials
- Best for: BJJ, grappling, training where communication matters most
- Remoldable up to 20 times
- BPA, Latex, PVC, Phthalate free
- $19.99
The Aero is the mouthguard for grapplers who hate mouthguards. At 1.6mm you barely notice it, which means you will actually keep wearing it through every round.
⭐ BESTSELLER — EASIEST FIT
Sisu 3D Mouthguard
- 2.0mm thin with pre-formed 3D shape
- Variable material thickness — more protection where needed, more comfort where it matters
- Fastest, easiest fit in the Sisu range
- Effortless fit-and-go experience
- Best for: BJJ, MMA, athletes who want the easiest possible fitting process
- Works with braces (dentist fitting recommended)
- Adult and Youth sizes available
- $24.99
The 3D is our most popular choice. The pre-formed shape means your first mold is your perfect mold — no fiddling required.
🛡️ MAX PROTECTION
Sisu Max Mouthguard
- 2.4mm — maximum protection in the Sisu range
- Still 30% thinner than conventional mouthguards
- Ultra-slim profile despite increased thickness
- Best for: MMA, striking sports, anyone who has taken impact damage before
- Designed for high-impact combat sports
- Remoldable and durable
- $29.99
If you strike or spar striking regularly, the Max is worth the extra millimetre. You still get full breathability and communication, but with noticeably more protection behind the teeth.
🧒 YOUTH
Sisu 3D Youth Mouthguard
- Sized specifically for children under 5 feet tall
- Same Diffusix technology and 2.0mm thinness
- Perfect for young grapplers in BJJ or kids MMA
- Accommodates braces with dentist fitting
- $24.99
Which Sisu Should You Buy?
| Your Sport | Recommended Sisu |
|---|---|
| Pure BJJ (gi and no-gi) | Sisu Aero or 3D |
| BJJ + occasional MMA sparring | Sisu 3D |
| MMA / Muay Thai / Boxing | Sisu Max |
| Kids under 5 feet tall | Sisu 3D Youth |
| First-time mouthguard user | Sisu 3D (easiest fit) |
| Previous dental injuries | Sisu Max |
How to Fit Your Sisu Mouthguard
- Boil water — bring water to a boil, then remove from heat for 30 seconds
- Soak the mouthguard in the hot water for 20 seconds
- Remove with a slotted spoon and quickly rinse under cold water for 1 second
- Place on your upper teeth and bite down firmly
- Use your tongue and fingers to press the material against your teeth and gums
- Hold for 30 seconds, then remove and rinse in cold water to set the shape
If the fit is not perfect, simply remold — up to 20 times. This forgiveness is what makes Sisu different from single-use competitors.
Care & Hygiene
- Rinse with cool water after every use
- Store in a ventilated case — sealed cases breed bacteria
- Clean weekly with mild soap or mouthguard cleaner
- Replace every 6–12 months with heavy daily use
- Never leave in a hot car — the material can deform
🛒 Protect Your Teeth
Sisu mouthguards — ultra-thin, ultra-protective, designed for combat sports.
From $19.99. Worldwide shipping.
Frequently Asked Questions
Are Sisu mouthguards IBJJF legal?
Yes. Sisu mouthguards are compliant with IBJJF rules and all major BJJ / MMA / grappling competition regulations.
How long does a Sisu mouthguard last?
With daily use, expect 6–12 months. With 2–3 training sessions per week, 12–18 months. Replace if you notice tears, thinning, or if the fit becomes loose.
Can I wear a Sisu mouthguard with braces?
Yes — all Sisu models work with braces, but we recommend having a dental professional assist with the initial fit if you wear braces.
Can I use a Sisu for both upper and lower teeth?
No. Sisu is designed for the upper teeth. Most combat sports only require upper teeth protection because the impact forces come from below.
What is the dental warranty?
Sisu mouthguards come with up to a $35,000–$50,000 limited dental warranty for the first year, depending on the model. Check the specific model’s terms at purchase.
Can I re-mold if the fit is wrong?
Yes — up to 20 times. Simply repeat the fitting process with hot water. This is one of the main advantages over conventional boil-and-bite guards that can only be molded once.
The Bottom Line on Mouthguards
The best mouthguard is the one you will actually wear. Sisu wins because its ultra-thin, breathable design removes every excuse not to wear it. Compare to a traditional bulky mouthguard that ends up in your bag instead of your mouth — the Sisu is on your teeth, protecting you, every round.
At $19.99 for the Aero, $24.99 for the 3D, and $29.99 for the Max, Sisu pricing is trivial compared to a single dental injury. Stock the Sisu range at Element Fight Wear and wear it every session.
Shop Sisu Mouthguards at Element Fight Wear →
