SnoreRx is the better choice for most snorers because you can fine-tune it. The SleepTight Mouthpiece is the cheaper, simpler option and comes with an extra-large breathing opening. Both are FDA-cleared, boil-and-bite mandibular advancement devices (MADs) made in the USA. The difference is what happens after fitting: SnoreRx moves your jaw forward in numbered 1 mm steps whenever you like, while SleepTight holds the position you set when you mold it.
SleepTight costs $49.99 from its maker, Dentemp, against $59.99 for SnoreRx. Below is how they differ on fit, adjustment, breathing room, guarantees and who each one suits. Facts were checked on the makers’ websites and in the FDA 510(k) database in October 2026.
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Quick Verdict
- Choose SnoreRx if you want to start with a small jaw advancement and step it up 1 mm at a time until the snoring stops. That is the safest way to find the least advancement that works.
- Choose SleepTight if you want the lowest price, want to pick one up at a drugstore, or breathe partly through your mouth and want a big front opening.
- Choose neither if you have dentures, braces, loose teeth, gum disease, TMJ pain or possible sleep apnea. See who should skip both.
Check SnoreRx price → Check SleepTight price →
SnoreRx vs SleepTight: Side-by-Side
| Feature | SnoreRx | SleepTight Mouthpiece |
|---|---|---|
| Maker | Apnea Sciences (Aliso Viejo, California) | Dentemp; designed by dentist Dr. Mike Williams |
| Type | Two-tray MAD with calibrated adjustment | One-piece, dual-laminate MAD with large front opening |
| Price (maker) | $59.99 (2 for $99.99) | $49.99 |
| Fitting | Boil-and-bite: 60 seconds in microwave-boiled water, bite 30 seconds; up to 2 fittings | Boil-and-bite: 2½ minutes in just-boiled water; up to 2 fittings |
| Adjustment after fitting | Yes: 1 mm steps from a 1 mm factory setting | No: jaw position is set when you mold it (refit to change) |
| Breathing opening | Open front | Extra-large front opening; tongue rests forward in it |
| Material | Thermoplastic (“Thermal Matrix”) trays | EVA thermoplastic, BPA- and latex-free |
| FDA 510(k) | K153200: aid to reduce snoring, adults 18+ | K191618: aid to reduce snoring, adults 18+ |
| Guarantee | 30-night money-back (direct from snorerx.com) | No fixed-length guarantee published; depends on the retailer |
| Where to buy | snorerx.com | Dentemp.com, drugstores and online retailers |
| Best for | Finding the right advancement step by step | Lowest-cost trial; mouth breathers |
Prices are indicative. Check the merchant for current pricing.
How Each One Works
Snoring happens when relaxed tissue at the back of the throat vibrates as air squeezes past. During sleep the lower jaw drops back and the tongue follows it, narrowing the airway. A MAD grips your upper and lower teeth and holds the lower jaw a few millimeters forward, which keeps more space behind the tongue. (More in how snoring mouthpieces work.)
SnoreRx has separate upper and lower trays that lock together at the front. You squeeze the marked points on the upper tray, slide the lower tray to the next number and release it, and it clicks into place. The scale shows on both sides.
SleepTight is a single piece with a soft inner layer and a firmer outer layer (Dentemp calls it a “dual-laminate” design). Its signature feature is a large opening at the front. Dentemp’s instructions say to rest your tongue forward in that opening, which it describes as “gentle retention of the tongue.” That is a positioning tip, not a separate tongue-holding mechanism. The device’s FDA filing describes it purely as a jaw-advancing device.
Fitting and Adjustment
Fitting SnoreRx
You heat water to a full boil in the microwave, submerge the device for exactly 60 seconds, bite down with your teeth centered for 30 seconds, then set it in cool water for 5 minutes. A second fitting is allowed if the impressions are shallow. You fit it at the factory setting and do the advancing afterward.
Fitting SleepTight
Dentemp’s instructions: bring water to a rolling boil, pour it into a bowl, wait 10 seconds, then hold the SleepTight under for 2½ minutes. Center it on your lower teeth with the V-notch at the top, bite gently (moving your jaw slightly forward if needed), press the soft material against your teeth and gums with your fingers, and suck and push your tongue against it. Once it has firmed up, put it in cold water for 5 minutes. You can repeat the fitting once to improve the fit.
The key difference
With SleepTight, the forward jaw position is whatever you bit into. Dentemp suggests wearing it for at least 5 nights before changing anything. If you still snore, it says refitting with the jaw further forward may help, and if your teeth are sore, refit with the jaw less forward. Because you only get two fittings in total, you have one chance to correct it.
With SnoreRx you start at 1 mm and step forward one millimeter at a time. The maker says most people settle at 3–5 mm, and you can step back if your jaw aches. That control is the main reason we rate SnoreRx highly (8.8/10 in our SnoreRx review). See how to adjust a snoring mouthpiece.
Winner for fit and adjustment: SnoreRx.
Comfort and Breathing
- Mouth breathing: SleepTight’s large front opening is its strongest selling point. Dentemp says it lets you breathe easily while you sleep, which can help if your nose is often congested. SnoreRx also leaves an opening at the front, but airflow isn’t its main design focus.
- Bulk: SnoreRx is a fairly bulky rigid design with no hinge, and some people find it hard to close their lips around. SleepTight is a single molded piece, so it doesn’t let your mouth open either.
- Tooth pressure: Dentemp says SleepTight holds the jaw forward using the side teeth as well as the front teeth. Any MAD can cause tooth soreness in the first couple of weeks. SnoreRx lets you ease off by 1 mm, while with SleepTight you would refit.
- Falling out: Dentemp says this is usually caused by a poor first fitting or by clenching and grinding stretching the material, and recommends refitting with firm finger and tongue pressure and sleeping on your side.
- Early side effects with both: extra saliva, mild jaw or tooth soreness, and a strange feel for the first few nights. These usually settle within a week or two. Stop and see a dentist if pain persists or your bite feels different. See jaw pain from a snoring mouthpiece.
Winner for comfort: a tie. SleepTight is better for mouth breathers, and SnoreRx is better for managing soreness.
Price, Guarantee and Where to Buy
SleepTight is $49.99 on dentemp.com, and Dentemp says its products are sold at drug, grocery and mass retail stores and online. It is often easy to find on Amazon (our “Check price” link goes to an Amazon search). Dentemp doesn’t publish a fixed money-back period. Its refund policy says it handles each contact individually, so check the return policy of whichever store you buy from.
SnoreRx is $59.99, or two for $99.99, from snorerx.com, with a 30-night money-back guarantee for direct purchases (product price only). If a refund window matters to you, buying SnoreRx direct is the more predictable option. See where to buy SnoreRx.
Winner for price: SleepTight. Winner for refund certainty: SnoreRx.
Who Should Buy SnoreRx?
- Nightly snorers who want to find the smallest jaw advancement that works.
- People who tried a fixed-position mouthpiece and found it too weak or too strong.
- Buyers who want a clear 30-night refund window.
Want a hinge so your mouth can open at night? SnoreRx Plus ($99.99) adds one. Compare them in SnoreRx vs SnoreRx Plus.
Who Should Buy SleepTight?
- Budget buyers who want to test whether a jaw-advancing mouthpiece helps at all.
- People who breathe partly through their mouth and want a large front opening.
- Anyone who would rather pick one up at a local drugstore than order online.
Who Should Skip Both
- Possible sleep apnea: loud snoring with gasping, choking, pauses in breathing, heavy daytime sleepiness or morning headaches. See a doctor for a sleep test first. Both devices are FDA-cleared only as aids to reduce snoring, not to treat sleep apnea.
- Dentures or braces: Dentemp says SleepTight is not recommended for either, and SnoreRx also needs healthy natural teeth. If you have crowns or caps, ask your dentist first.
- Loose teeth, advanced gum disease or TMJ pain: check with a dentist before using any MAD.
- Asthma, central sleep apnea or severe respiratory disorders: Dentemp’s cautions say SleepTight should not be used.
- Under 18: both are cleared for adults only.
If a jaw device isn’t an option, a tongue-stabilizing device such as Good Morning Snore Solution doesn’t grip the teeth. More: who should not use a snoring mouthpiece.
Related Comparisons
- ZQuiet vs SleepTight
- VitalSleep vs SleepTight
- PureSleep vs SnoreRx
- ZQuiet vs SnoreRx
- SnoreRx vs VitalSleep
The Bottom Line
SnoreRx is the more capable mouthpiece. Its 1 mm adjustment lets you correct the fit as you go instead of relying on a single impression, and you get a clear 30-night refund window. SleepTight makes sense when price and convenience come first, or when you need the extra breathing room of its large front opening.
FAQ
Is SnoreRx better than SleepTight?
For most people, yes, because SnoreRx can be adjusted in 1 mm steps after fitting while SleepTight can’t. SleepTight is $10 cheaper and has a larger front opening for mouth breathing.
Who makes the SleepTight mouthpiece?
It is sold under the Dentemp brand. The FDA clearance (K191618, December 2019) was filed by Michael D. Williams, DDS, the dentist who designed it.
Is the SleepTight mouthpiece FDA-approved?
It is FDA-cleared (the correct term for this class of device) through 510(k) K191618 as an over-the-counter aid to reduce snoring in adults 18 and older. It is not cleared to treat sleep apnea. SnoreRx has the same type of clearance (K153200).
Can you adjust the SleepTight mouthpiece?
Only by refitting it. Dentemp says it can be fitted up to two times, and that refitting with the jaw further forward may help if you still snore. There is no adjustment mechanism.
Where can I buy the SleepTight mouthpiece?
From dentemp.com ($49.99) and, according to Dentemp, from drug, grocery and mass retail stores and online retailers such as Amazon. Return terms depend on the seller.
Does SleepTight have a money-back guarantee?
Dentemp doesn’t publish a set guarantee period. Its refund policy says it handles each case individually. Check the return policy of the store you buy from. SnoreRx offers a 30-night money-back guarantee when bought directly.
