Venum Challenger Mouthguard Review (BJJ and MMA)

The Venum Challenger is one of the most popular budget mouthguards in BJJ and MMA. I have been rolling with mine for over a year and also fitted the child version on my 10-year-old. Here is the honest review: where it shines, where it falls short, and how to mould it properly so you do not ruin yours on day one.

You can check the current price on Amazon here.

Quick verdict

For under twenty dollars, the Venum Challenger is hard to beat. It is comfortable, easy to breathe through, and protects well enough for everyday BJJ training. It is not a custom-fit dentist guard, but most practitioners do not need that level of protection. If you train multiple times a week and need a reliable, low-fuss mouthguard, this is the one to start with.

Specs at a glance

• Boil-and-bite mould
• Dual-layer construction (soft gel frame, rigid outer shell)
• Large breathing channel for easy mouth-breathing
• Low-profile design (does not interfere with speech much)
• Comes with a protective vented case
• Adult and junior sizes
• Multiple colour options
• Typical price: around $13 to $20 on Amazon

Design and fit

The Challenger is a textbook dual-layer boil-and-bite. The outer shell is a high-density rubber that takes the impact, and the inner gel frame is the softer layer that moulds to your teeth. The fit is snug without being claustrophobic, and the cut leaves enough room at the back of the mouth that your jaw does not feel locked shut.

The low-profile shape is the part that matters most for BJJ. It does not protrude past the lips, so it does not catch on gi collars or sleeves during scrambles. It also stays put when you talk to your training partner between rounds, which sounds minor until you have used a guard that flops out every time you open your mouth.

Comfort and breathing

This is where the Challenger earns its reputation. The large central breathing channel makes a real difference in long rolls and harder rounds. Whether you wear it for an hour of drilling or six rounds of competition rolls, you can pull air through your mouth without clenching your teeth around the guard. Jaw fatigue is real if you have ever trained in a thick, cheap mouthguard, and the Challenger avoids it.

Protection

For BJJ training, the protection level is more than adequate. Most BJJ injuries to the teeth are accidental (a knee, a stray elbow, your own training partner's skull), and the Challenger absorbs those impacts cleanly. For full-contact MMA sparring or striking events, I would still recommend a custom dentist-made guard or a step up like an OPRO Gold, but for grappling-first practitioners this is enough.

Adult fit (my experience)

The adult version moulded easily on the first try. Boil water, drop it in for about 30 seconds, transfer to cold water for a few seconds to take the edge off, then bite down gently and suck the air out for a vacuum seal. Done. The vacuum step is the one most people skip and is the difference between a guard that snaps in like a custom job and one that wobbles after a week.

Junior version for kids

I bought the junior version for my 10-year-old. Out of the bag it looks worryingly small, but that is by design. After moulding, the material expands slightly under the heat and forms a snug fit on smaller mouths. He has worn it for months of training with no complaints about size or comfort.

A warning on the moulding process

This is the most important section in the review.

The instructions tell you to "bite down firmly." If you take that literally, you will bite straight through the soft gel layer and the guard will not seat properly. We did exactly this on my son's first attempt, and the damage was permanent because there was no soft material left at the base to bite into. We had to buy another.

What works:

1. Boil the water and drop the guard in for around 30 seconds
2. Transfer briefly to cold water for two or three seconds so it is workable
3. Place it in the mouth and bite down gently, not aggressively
4. Suck the air out and press your tongue up to seal the top
5. Hold for 30 seconds, then drop into cold water to set

A gentle bite preserves the moulding material and gives you a fit you can re-mould later if needed.

Pros

• Excellent breathing channel for grappling
• Comfortable enough for long sessions
• Cheap enough to replace yearly without thinking
• Easy mould when done correctly
• Junior version actually fits kids well

Cons

• Easy to over-bite during moulding and ruin the fit
• Not at the level of custom dentist-made guards for full-contact striking
• Colours fade over time
• No nightguard / heavy grinder protection

Helpful tip for fitting

When moulding, resist the urge to bite down hard. A gentle, even bite preserves the base material and keeps the guard seated for the long haul. If you have a habit of clenching, do a slow, controlled bite and breathe out through your nose to stop yourself from grinding.

Who should buy it

Buy the Venum Challenger if you are a BJJ practitioner who wants a reliable, comfortable mouthguard at a budget price. Buy the junior version for your kid (and follow the gentle-bite tip above).

Skip it if you compete in full-contact striking events and need a thicker custom-moulded guard.

How it compares to other BJJ mouthguards

If you want to see how the Challenger stacks up against the rest of the market, see our round-up of the top BJJ mouthguards on Amazon and our broader guide to picking the best BJJ mouthguard.

Frequently asked questions

Is the Venum Challenger mouthguard good for BJJ? Yes. The low-profile shape, large breathing channel and dual-layer protection are well suited to grappling. It is one of the most popular mouthguards on the BJJ mats for a reason.

How do I mould the Venum Challenger? Boil it for 30 seconds, dip in cold water briefly, bite down gently (not hard), suck the air out for a vacuum seal, hold for 30 seconds and then drop in cold water to set.

Can I use the Venum Challenger for MMA or boxing? Yes, it works for MMA and boxing sparring, but for full-contact striking competition you may want a thicker custom dentist-made guard.

Is there a kid version of the Venum Challenger? Yes. The junior size is designed for younger mouths and moulds the same way as the adult version. Just go easy on the bite during moulding.

How long does the Venum Challenger last? With proper care (rinse after each session, store in the vented case, keep away from heat), expect 12 to 18 months of regular training before you need to replace it.

Final word

The Venum Challenger is the no-nonsense mouthguard pick for BJJ. Cheap, comfortable, breathes well, protects well. Mould it gently and it will see you through a year or more of training without complaint.

You can check the current price on Amazon here.