Beginner picks · Protection
Best Mouthguards for Kids
A child's mouthguard has one job an adult's does not: fitting a mouth that is still changing. Teeth come and go, jaws grow, and a guard moulded in March can be loose by September. So the models that matter here are the ones with a published youth size band — and ideally one you can remould as the mouth changes.
Written by Mike M. · Owner, Iron Mako Media
Published
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Part of the Protection hub.
Quick picks
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 01 |  Shock Doctor Gel Max Mouthguard The safe default boil-and-bite: a triple-layer guard with a gel-fit liner and an exoskeletal frame, in youth and adult sizes, with a convertible strap you can leave off for boxing. | A first mouthguard for an adult or a child over 10 who wants a full-thickness guard | 8.0 | |
| 02 |  OPRO Gold Level Mouthguard The self-fit guard with fins: OPRO's dual-layer Gold Level molds with a single compression cage and fin technology drawn from its custom-impression data — in adult and youth sizes, with a braces version. | A beginner who wants the closest thing to a custom fit without a dentist visit | 8.2 | |
| 03 |  SISU Max 2.4 mm Mouthguard The thin-guard option built for contact: 2.4 mm, braces-compatible, remoldable, and SISU's own recommendation for MMA and other high-impact sports. | Anyone who can't stand a bulky guard, and braces wearers who want a moldable option | 7.8 | |
| 04 |  Shock Doctor Braces Mouthguard The no-boil braces guard: medical-grade silicone that pops in and conforms to upper brackets, adapts as the braces move, and comes in youth and adult sizes — the easy answer for a kid in orthodontics. | Anyone with upper braces who wants an instant fit with no boiling | 7.8 | |
| 05 |  SISU Aero 1.6 mm Mouthguard The thinnest SISU at 1.6 mm — easiest to talk and breathe through, but SISU itself lists it for lower-contact sports, so for boxing it is the light-sparring and bag-work option. | Bag work and very light drilling where you want to forget the guard is in | 7.4 |
Scores are our editorial judgment from each model's published specs, size charts and manuals, weighted for what a first home setup needs.
The short answer
For most children boxing at a club, the Shock Doctor Gel Max in its Youth size (10 and under) is the sensible buy: a full-thickness boil-and-bite guard in a published youth band, from the brand with the widest availability. If the child has braces, skip straight to the Shock Doctor Braces guard, which is designed to be used without boiling at all. If the mouth is changing fast and you want one guard to last, the SISU Max can be remoulded repeatedly.
Why a child's mouthguard is a different purchase
- The mouth is a moving target. Primary teeth fall out, adult teeth erupt at different rates, and the jaw grows. A guard that fitted perfectly can be loose in months, and a loose guard is a guard that gets spat out or chewed rather than worn.
- Published size bands matter more than features. Youth and adult are not interchangeable, and the only honest way to buy is to read the manufacturer's stated age or size band. Every pick here publishes one.
- Remouldability is a real advantage. Most boil-and-bite guards can only be fitted properly once; some, like the SISU models, are designed to be remoulded. For a seven-year-old that is the difference between one purchase and three.
- Braces change everything. Do not boil-and-bite a guard over braces — a moulded guard locks onto the brackets. Use a guard designed for braces, which fits without moulding.
| Pick | Youth band | Fit method | Braces |
|---|---|---|---|
| Shock Doctor Gel Max | Youth: 10 and under | Boil-and-bite | No |
| OPRO Gold Level | Youth: under 10 | Self-fit, fin technology | Separate braces model |
| SISU Max 2.4 mm | Sized range, remouldable | Hot-water mould, remouldable | Compatible |
| Shock Doctor Braces | Youth: 11 and under | Instant, pop-in (no boil) | Upper braces |
| SISU Aero 1.6 mm | Small junior | Hot-water mould, remouldable | Adult: compatible |
How this list is ordered
By our published mouthguard rubric — fit and retention, protection, breathability and speech, fitting method and value — with published youth sizing treated as a gate rather than a score: a guard with no stated youth band does not appear here at all. Every spec comes from the manufacturer page cited under each card, checked on 10 October 2026.
Thickness: what to actually buy for a child
Thicker guards absorb more and are harder to talk and breathe through; thinner guards are easier to tolerate and protect less. For a child who will be sparring, buy the full-thickness guard — the tolerance problem is solved by getting a good fit, not by buying a thinner guard. A low-profile guard like the SISU Aero is for the child who genuinely cannot keep a thicker one in, or for bag and pad work where contact is not the point. Our boil-and-bite vs custom comparison covers the tier above all of these.
Fitting a child's guard without ruining it
Boil-and-bite guards get one good attempt, and children usually need an adult to do the fitting. Follow the manufacturer's water temperature and timing exactly — not approximately — and do the suck-and-bite step properly or the guard will be loose at the back. The full sequence, including how to tell a good fit from a bad one, is in how to fit a boil-and-bite mouthguard. Remouldable guards are far more forgiving here, which is most of why they are on this page.
Replacement, which is the part people skip
Check a child's guard every couple of months: hold it up, look for tears at the edges and chewed-through thin spots, and have them put it in and try to dislodge it with their tongue. A guard that moves, a guard with a hole, or a guard that no longer seats after a tooth has come out is finished. Children chew through guards far faster than adults do, and a chewed guard is not protecting the teeth underneath it.
The picks in detail
Every pick, reviewed
Key specs
- Sizes
- Youth (10 & under) · Adult (11+)
- Fit
- Boil-and-bite
- Build
- Triple layer, gel-fit liner
Scores · editorial, out of 10
- Fit & retention
- 8
- Breathing & speech
- 6
- Protection thickness
- 9
- Ease of molding
- 8
- Value
- 9
Pick 01 · Mouthguards · REF PRO-01
Shock Doctor Gel Max Mouthguard
Shock Doctor
The safe default boil-and-bite: a triple-layer guard with a gel-fit liner and an exoskeletal frame, in youth and adult sizes, with a convertible strap you can leave off for boxing.
Best for
A first mouthguard for an adult or a child over 10 who wants a full-thickness guard
Why it is #1. A triple-layer boil-and-bite guard with a gel-fit liner, in a clearly published Youth band for 10 and under plus an Adult band for 11 and up — so there is a sensible next purchase in the same product when the child outgrows it. Full thickness, which is what you want for sparring, and the easiest of these to find. It fits once, properly, so take the fitting seriously; and it is not a braces guard.
Pros
- Triple-layer design with Shock Doctor's gel-fit liner and a heavy-duty exoskeletal frame
- Two age-based sizes
- Convertible tether — strapped for helmet sports, strapless for boxing
- Shock Doctor lists a limited dental warranty; HSA/FSA eligible per the product page
Cons
- Not compatible with braces — Shock Doctor points braces wearers to its dedicated models
- Thicker than a SISU; breathing and speaking take a session to get used to
Specs from Shock Doctor — Gel Max Mouthguard (features, sizing, fitting).
Key specs
- Sizes
- Adult (10+) · Youth (under 10)
- Fit
- Self-fit, fin technology
- Braces
- Separate Gold Level Braces model
Scores · editorial, out of 10
- Fit & retention
- 9
- Breathing & speech
- 8
- Protection thickness
- 9
- Ease of molding
- 7
- Value
- 7
Pick 02 · Mouthguards · REF PRO-02
OPRO Gold Level Mouthguard
OPRO
The self-fit guard with fins: OPRO's dual-layer Gold Level molds with a single compression cage and fin technology drawn from its custom-impression data — in adult and youth sizes, with a braces version.
Best for
A beginner who wants the closest thing to a custom fit without a dentist visit
The best fit of the boil-and-bite style guards. OPRO's fin technology holds the guard against the teeth while the material sets, which gets closer to a custom fit than a plain boil-and-bite — genuinely useful on a child's smaller mouth where a sloppy mould shows up as a guard that drops at the back. Published in Youth (under 10) and Adult (10+). Second only because it is a single-fit guard: one attempt, and a fast-changing mouth will outgrow it.
Pros
- Patented fins placed from OPRO's custom-fit impression data, molded with a single compression cage
- Dual-layer, ultra-impact-resistant construction — Level 4 in OPRO's self-fit range
- Adult and youth sizes, plus a dedicated Gold Level Braces variant
- Dental warranty listed on every guard
Cons
- Pricier than a basic boil-and-bite
- The fitting cage adds a step; read the instructions before the water is hot
Specs from OPRO — Gold Level mouthguards (sizes, fit, braces variant).
Key specs
- Thickness
- 2.4 mm
- Fit
- Hot-water mold, remoldable
- Braces
- Compatible
Scores · editorial, out of 10
- Fit & retention
- 8
- Breathing & speech
- 10
- Protection thickness
- 7
- Ease of molding
- 6
- Value
- 7
Pick 03 · Mouthguards · REF PRO-03
SISU Max 2.4 mm Mouthguard
SISU
The thin-guard option built for contact: 2.4 mm, braces-compatible, remoldable, and SISU's own recommendation for MMA and other high-impact sports.
Best for
Anyone who can't stand a bulky guard, and braces wearers who want a moldable option
The one to buy if the mouth is changing fast. 2.4 mm, moulded in hot water rather than boiling, and — the reason it is here — remouldable, repeatedly. When a tooth comes out or the jaw grows, you refit the same guard instead of buying another. It is also braces-compatible, which puts it ahead of the two guards above for a child in orthodontics who still wants a moulded fit. Thinner than the Gel Max, which some children prefer and which is a genuine protection trade.
Pros
- SISU's thickest guard at 2.4 mm — the one it recommends for MMA/BJJ, hockey and football
- Remoldable in hot water (SISU cites up to 20 times) as your fit changes
- Braces compatible, per SISU's comparison chart
- Thermoplastic material SISU rates as stronger than conventional guard material; dental warranty listed
Cons
- One adult size (athletes over 5 ft); the junior Aero Small is a different, thinner product
- The fit is unforgiving — a rushed mold feels loose, so follow the instructions exactly
Specs from SISU — product comparison chart (Aero, Max, Go, Junior).
Key specs
- Sizes
- Youth (11 & under) · Adult (12+)
- Fit
- Instant, pop-in (no boil)
- Coverage
- Upper braces
Scores · editorial, out of 10
- Fit & retention
- 7
- Breathing & speech
- 8
- Protection thickness
- 7
- Ease of molding
- 10
- Value
- 8
Pick 04 · Mouthguards · REF PRO-04
Shock Doctor Braces Mouthguard
Shock Doctor
The no-boil braces guard: medical-grade silicone that pops in and conforms to upper brackets, adapts as the braces move, and comes in youth and adult sizes — the easy answer for a kid in orthodontics.
Best for
Anyone with upper braces who wants an instant fit with no boiling
The pick for a child with upper braces. An instant pop-in guard with no boiling at all — which is exactly right, because moulding a guard over brackets locks it onto them. Published in Youth (11 and under) and Adult (12+), with coverage designed around upper braces; the Double Braces version covers upper and lower. Lower on the list only because it is the specialist answer: if there are no braces, one of the moulded guards fits better. Full detail on mouthguards with braces.
Pros
- Instant-fit design — no boiling, so it can be replaced or re-seated at the gym
- 100% medical-grade silicone; latex-, BPA- and phthalate-free per Shock Doctor
- Adapts to tooth position as braces are adjusted
- Strapless and strapped versions; dental warranty listed
Cons
- Upper braces only — Shock Doctor sells a separate Double Braces model for upper and lower
- Without a bite mold it relies on the silicone's conformity, so retention is looser than a molded guard
Specs from Shock Doctor — Braces Mouthguard (fit, sizes, materials).
Key specs
- Thickness
- 1.6 mm
- Sizes
- Medium/Large adult · Small junior
- Braces
- Adult: compatible
Scores · editorial, out of 10
- Fit & retention
- 8
- Breathing & speech
- 10
- Protection thickness
- 5
- Ease of molding
- 6
- Value
- 7
Pick 05 · Mouthguards · REF PRO-05
SISU Aero 1.6 mm Mouthguard
SISU
The thinnest SISU at 1.6 mm — easiest to talk and breathe through, but SISU itself lists it for lower-contact sports, so for boxing it is the light-sparring and bag-work option.
Best for
Bag work and very light drilling where you want to forget the guard is in
Last, and the right answer for one specific child. 1.6 mm, remouldable, sold in a Small junior size as well as adult — the thinnest guard here by a clear margin. It is easy to talk and breathe through, which makes it the guard a child will actually keep in. The trade is explicit: less material is less protection, so we would use this for pad and bag work or for a child who cannot tolerate a thicker guard at all, not as the default sparring choice.
Pros
- 1.6 mm profile — talking, breathing and drinking with it in is the whole point
- Adult sizes are braces compatible, per SISU
- Remoldable in hot water; dental warranty listed
Cons
- SISU's own chart recommends it for lacrosse, soccer and basketball — the Max is its pick for high-impact sports
- The junior Aero Small is not braces compatible
Specs from SISU — product comparison chart (Aero, Max, Go, Junior).
Buying guide
Do children need a mouthguard for boxing at home?
Not for hitting a bag or pads. A mouthguard is for contact — sparring and competition — and buying one before there is any contact is money you could spend on wraps and gloves that fit. The moment sparring is on the table, the mouthguard is the first thing in the bag, before headgear. Our first sparring kit checklist puts the whole sequence in order, and when you need headgear covers the other half.
Youth bands are age bands, not mouth measurements
Every band here is published as an age range, which is a proxy for mouth size and nothing more. A large eleven-year-old may need the adult size and a small twelve-year-old may still fit the youth. Use the band as the starting point, fit the guard, and judge the result on whether it seats firmly and stays put when the child tries to dislodge it with their tongue.
Loose teeth and erupting adult teeth
This is the most common question parents ask us and the honest answer is that it is a dental question. A remouldable guard handles the mechanics better — you refit as the mouth changes — but whether a child with a wobbly tooth or a half-erupted adult tooth should be in contact training at all is a conversation for their dentist, not for a gear site.
Care, so it lasts the season
- Rinse in cool water after every session. Never hot water — it can deform the mould.
- Store it dry in a vented case, not sealed in a kit bag.
- Keep it out of the sun and out of a hot car. Heat is what ruins a fitted guard.
- Check it monthly for tears and chew-through, and replace it when it stops seating.
- One guard per child. They are not shared equipment.
Mistakes to avoid
- Buying an adult guard and trimming it down. The band is published for a reason.
- Boiling a braces guard. It will lock onto the brackets.
- Rushing the fitting. A sloppy mould drops at the back and gets chewed instead of worn.
- Buying the thinnest guard so the child does not complain, then using it for sparring.
- Keeping a guard a year because it still looks fine. Check whether it still seats.
FAQ
Frequently asked questions
What mouthguard should a child use for boxing?
A guard with a published youth size band. For most children that is the Shock Doctor Gel Max in Youth (10 and under) or the OPRO Gold Level in Youth (under 10). If the mouth is changing fast, a remouldable guard like the SISU Max saves buying another one.
Can kids use adult mouthguards?
Not reliably, and trimming one down is not a fix. Youth bands exist because a child's dental arch is smaller; an oversized guard sits loose at the back, which is where it stops protecting and starts getting chewed.
What mouthguard for a child with braces?
One designed for braces, fitted without boiling — the Shock Doctor Braces guard for upper braces, or the Double Braces version for upper and lower. Never mould a standard boil-and-bite guard over brackets. Ask their orthodontist first.
Do kids need a mouthguard for hitting a punching bag?
No. Mouthguards are for contact: sparring and competition. A child hitting a bag at home needs wraps and properly sized gloves, not a mouthguard.
How often should a child's mouthguard be replaced?
Check it every month or two and replace it when it no longer seats firmly, when there are tears or chewed-through spots, or after a tooth comes out and changes the fit. Children get through guards much faster than adults.
Can a child's mouthguard be remoulded as they grow?
Only if the manufacturer says so. Standard boil-and-bite guards fit once. The SISU models are designed to be remoulded repeatedly, which is why they are on this list for fast-changing mouths.
Next in your kit
Best boxing headgear for kids →Keep reading
Related guides
- Best mouthguard for boxing →
The adult ranking.
- Mouthguards for braces →
If there are brackets involved.
- How to fit a boil-and-bite mouthguard →
Getting the one attempt right.
- Best boxing headgear for kids →
The other half of a child's sparring kit.
- Boxing gear for kids →
The whole kit, in order.
Sources
- —USA Boxing National Rule Book, effective January 1, 2025 — Rule 37 (Headgear), Rule 39 (Mouthpiece), Appendix G (braces release) · usamastersboxing.com
- —Shock Doctor — Gel Max Mouthguard (features, sizing, fitting) · shockdoctor.com
- —OPRO — Gold Level mouthguards (sizes, fit, braces variant) · opro.com
- —SISU — product comparison chart (Aero, Max, Go, Junior) · sisuguard.com
- —Shock Doctor — Braces Mouthguard (fit, sizes, materials) · shockdoctor.com