Manta Sound vs Therabody SmartGoggles: Which Smart Sleep Mask Wins?
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Quick Picks
Note: the Manta Sound reviewed here is no longer available on Amazon. A comparable audio sleep mask there is the Sleenova SoundMask (about $129.99), which the Amazon link below goes to.
When sleep trackers told me my sleep was terrible despite feeling rested, I learned something crucial: not all sleep tech serves the same purpose. Some devices, like the Manta Sound and Therabody SmartGoggles, focus on actively helping you fall asleep rather than just tracking what went wrong.
Both represent premium approaches to sleep improvement, but they solve fundamentally different problems. The Manta Sound prioritizes audio control and complete blackout for side sleepers, while the Therabody SmartGoggles emphasizes therapeutic massage with biometric heart rate tracking. After researching both extensively, here’s what actually matters when choosing between them.
The Quick Verdict
Choose Manta Sound if you listen to podcasts or white noise while sleeping, prioritize side-sleeping comfort, or need maximum battery life. Choose Therabody SmartGoggles if you suffer from tension headaches, want therapeutic heat and massage, or prefer science-backed sleep prep routines.
Shop on Amazon: See the Sleenova SoundMask on Amazon → | Therabody SmartGoggles →
Neither device tracks sleep quality like wearables do. Both focus on creating conditions for better sleep through different methods: audio immersion versus physical therapy.
Design and Comfort: Different Philosophies
Manta Sound: Built for Side Sleepers
The Manta Sound uses C-shaped eye cups that sit flat against your temples, creating zero eye pressure regardless of sleep position. The ultra-thin Bluetooth speakers measure just 5mm, roughly the thickness of a yoga mat. This matters significantly when lying on your side.
I’ve tested enough sleep masks to know that side sleeping reveals design flaws immediately. The Manta’s adjustable speaker positioning means you can slide them along tracks within the mask to find the perfect placement for your ears. This isn’t just convenient, it’s essential for comfort and sound quality.
The new generation features 3D-knit mesh design with 50% more breathability than the previous version. Perforated materials throughout the strap prevent overheating during extended wear. At approximately 100 grams, it’s notably lighter than the SmartGoggles.
Therabody SmartGoggles: Therapy Over Audio
The SmartGoggles 2nd Gen weighs 390 grams (13.7 ounces), nearly four times heavier than the Manta Sound. This isn’t poor design but intentional for delivering compression massage. The padded interior uses protein leather fabric with contoured cushioning that distributes weight across your forehead and temples rather than your eyes.
The 100% blackout design blocks all light through redesigned padding that molds to different face shapes. The curved adjustable strap sits above your ears for even weight distribution. Therabody includes an optional overhead strap for additional stability, though most users report the standard strap suffices.
The bulkier profile becomes noticeable during side sleeping. While the SmartGoggles work in any position, the compression and weight feel more pronounced when not lying flat on your back. This isn’t necessarily negative, compression can promote relaxation, but it represents a different comfort profile than the Manta’s barely-there feel.
Audio Capabilities: Bluetooth vs Soundscapes
Manta Sound’s Audio Experience
The Manta Sound connects via standard Bluetooth to any audio source on your phone. You stream whatever helps you sleep: podcasts, audiobooks, meditation apps, white noise, or music. The speakers won’t rival dedicated headphones, they’re optimized for comfortable sleep audio rather than hi-fi listening.
Sound quality proves adequate for spoken word content and ambient soundscapes. At normal listening volumes (around 40-50%), your bed partner shouldn’t hear your audio. Cranking volume to 80% makes audio audible to nearby sleepers, an important consideration for couples.
The critical advantage: no battery notifications disrupting sleep. Unlike competing audio masks that beep when battery runs low, the Manta Sound simply stops playing audio without waking you. This seemingly small detail makes substantial difference at 3am.
If the Manta Sound is the side you lean toward for Bluetooth audio, it’s worth thinking about what you’ll stream through it. Slow audiobooks and sleep stories work far better for me at bedtime than music, and having a deep library on hand makes the mask genuinely useful rather than a gadget you forget about. A free 30-day Audible trial is a no-cost way to build that library before deciding.
SmartGoggles Sound Therapy Integration
The SmartGoggles don’t play audio through built-in speakers. Instead, the Therabody app provides TheraMind sound therapy that pairs with the device’s vibration and heat treatments. You listen through your own headphones or earbuds while wearing the goggles.
This creates a multi-sensory experience: guided meditation or ambient sounds through headphones synchronized with facial massage, heat, and biometric-driven vibration. The app offers sleep-specific soundscapes ranging from rain to guided breathing exercises.
The limitation: you can’t simply play your favorite podcast without the app involvement. This works beautifully for structured 15-minute pre-sleep routines but less well for open-ended audio listening until you drift off naturally.
Core Technology: Audio Freedom vs Therapeutic Massage
Manta Sound Technology
The Manta Sound focuses purely on controlling two primary sleep senses: sight and sound. The technology stack remains straightforward: Bluetooth 5.0 connectivity, ultra-thin speaker drivers, adjustable positioning system, and 100% blackout eye cups.
There’s no heart rate monitoring, no heating elements, no vibration motors. This simplicity translates to longer battery life and lighter weight. The magnetic closure system allows easy electronics removal for washing the fabric components.
Adjustability extends beyond standard fit customization. The wave-shaped speaker cables maintain position after adjustment, ensuring your perfect fit persists through movement during sleep. The optional overhead strap prevents mask migration for restless sleepers.
SmartGoggles Therapeutic Approach
The SmartGoggles pack significantly more technology into their bulkier frame. A biometric sensor monitors your heart rate continuously during use. In SmartRelax mode, the vibration pattern synchronizes with your heartbeat, gradually slowing the vibration frequency to encourage your heart rate to follow downward.
A SleepScore Labs study with 20 participants found that nightly SmartGoggles use correlated with 82% of users reporting feeling less stressed and 71% experiencing lower anxiety levels. Participants also reported falling asleep faster and spending more time in deep sleep.
Three preset modes deliver different combinations of compression massage, heat, and vibration. Focus mode emphasizes temple massage and heat for eye strain relief. Sleep Prep uses gentle warmth with slow-wave vibration. Each session auto-shuts off after 15 minutes.
The therapeutic approach makes sense for people dealing with screen fatigue or tension headaches alongside sleep issues. If you spend hours staring at monitors and frequently massage your temples, the SmartGoggles address both problems simultaneously.
Battery Life: All Night vs Pre-Sleep Session
Battery performance represents perhaps the most significant practical difference between these devices.
Manta Sound: 24-Hour Endurance
The Manta Sound delivers 24 hours of continuous playback at 100% volume. At typical listening levels (40-60%), expect closer to 30-36 hours between charges. This means weekly charging for most users, not nightly.
I appreciate devices that don’t require daily charging. Managing yet another device’s battery adds mental overhead that defeats the purpose of relaxation technology. The Manta’s extended battery life means you can actually forget about it between uses.
Charging via USB-C takes approximately 2 hours from empty to full. The mask remains fully functional while charging if you want to use it plugged in, though the cable somewhat defeats the wireless convenience.
SmartGoggles: Session-Based Runtime
The SmartGoggles offer 180 minutes (3 hours) of battery life per charge. Given that sessions auto-shut off after 15 minutes, this provides 12 sessions before requiring a recharge. For nightly use, that’s nearly two weeks of battery life.
The shorter overall runtime makes sense given the power requirements. Heat generation, vibration motors, and biometric sensors consume significantly more power than simple audio playback. The session-based design means you’re not wearing them all night anyway.
USB-C charging takes about 90 minutes for a full charge. The battery indicator lights show remaining charge level, giving you warning before it dies mid-session.
Side Sleeping Comfort: The Critical Differentiator
If you’re a side sleeper, this section matters more than any spec comparison.
The Manta Sound’s 5mm speaker thickness disappears during side sleeping. You might forget you’re wearing electronics at all. The C-shaped eye cups distribute pressure away from your eyes, and the adjustable speaker positioning means you can shift them forward or backward to avoid ear pressure.
After abandoning expensive sleep tech because side sleeping made it uncomfortable, I’ve learned to prioritize this seemingly simple factor. Devices that work perfectly while lying on your back but dig into your ear or temple when you roll over aren’t useful for real sleep.
The SmartGoggles’ 390-gram weight becomes more noticeable on your side. The compression that feels therapeutic on your back can feel like pressure when your head presses against a pillow. This doesn’t make them unsuitable for side sleepers, many users report no issues, but it represents a less optimized experience than the Manta.
The SmartGoggles excel for their intended use case: 15-minute pre-sleep sessions while lying on your back. You complete your therapeutic session, remove the device, then sleep normally in whatever position you prefer.
Use Cases: When Each Device Excels
Ideal Scenarios for Manta Sound
- Listening to podcasts, audiobooks, or meditation apps while falling asleep
- Side sleeping throughout the night
- Sharing a bedroom where partner’s sounds or light disrupt your sleep
- Travel sleep in noisy environments (planes, hotels, shared accommodations)
- Shift workers needing daytime blackout and noise isolation
- Long listening sessions without frequent charging interruptions
Ideal Scenarios for SmartGoggles
- Screen-related eye strain and tension headaches
- High stress levels requiring active relaxation techniques
- Difficulty transitioning from work mode to sleep mode
- Preference for structured pre-sleep routines
- Interest in biometric-driven relaxation protocols
- Migraine or sinus pressure relief alongside sleep preparation
Price and Value Assessment
The Manta Sound retails for $159, positioning it in the premium sleep mask category but below therapeutic device pricing. You’re paying for quality audio integration, excellent blackout design, and side-sleeping optimization. The official Manta Sound product page provides detailed specifications and current pricing.
The Therabody SmartGoggles list at $219.99, though they frequently appear on sale for $169.99. The price reflects therapeutic capabilities beyond basic sleep assistance: biometric sensors, multiple massage modes, heat therapy, and app integration. The Therabody SmartGoggles product page details features and specifications.
Neither device offers exceptional value compared to basic sleep masks, and that’s acceptable. You’re not buying blackout fabric, you’re investing in specific solutions to specific problems. The Manta solves audio-during-sleep comfort. The SmartGoggles solve tension-driven sleep difficulty.
Value assessment depends entirely on whether the device addresses your actual obstacle to sleep. A $159 solution to a problem that’s been costing you sleep for months represents good value. A $220 device you use twice and abandon represents poor value regardless of its technical capabilities.
Cleaning and Maintenance
The Manta Sound uses a magnetic closure system that allows you to remove all electronics from the fabric components. You can hand wash the fabric mask and headband, then reattach the speaker units when dry. This design prevents the common problem of sleep masks developing odor from nightly use.
The SmartGoggles require spot cleaning only. The protein leather fabric resists absorption but you can’t immerse the device in water due to integrated electronics. Therabody recommends wiping with a damp cloth and mild soap as needed.
From experience, items you wear nightly against your face need regular cleaning. The Manta’s washable design provides a practical advantage here, particularly for people who use skincare products before bed or who simply prefer maximum hygiene.
Sleep Tracking: Neither Device Monitors Sleep
Importantly, neither the Manta Sound nor the SmartGoggles track your sleep stages, sleep duration, or sleep quality metrics. This represents a philosophical difference from devices like the Oura Ring or WHOOP strap.
The SmartGoggles monitor heart rate during use for biometric-responsive vibration, but they don’t analyze sleep architecture or provide morning sleep reports. The Manta Sound contains no biometric sensors whatsoever.
Having been told by sleep trackers that my sleep was terrible despite feeling rested, I’ve developed skepticism about consumer sleep tracking accuracy. Research published in the SLEEP journal examining consumer sleep trackers found variable performance compared to polysomnography, particularly for sleep stage assessment.
These devices take a different approach: creating better conditions for sleep rather than measuring what went wrong. This philosophical difference matters when setting expectations. Don’t buy either device expecting detailed sleep analytics.
Potential Drawbacks and Limitations
Manta Sound Limitations
- Audio quality doesn’t match dedicated headphones
- Speaker positioning requires initial adjustment period to find optimal placement
- Heavier than non-audio Manta masks due to electronics
- Premium price for what’s essentially a high-quality sleep mask with decent Bluetooth speakers
- Sound leakage at high volumes may disturb light-sleeping partners
SmartGoggles Limitations
- Significantly bulkier and heavier than standard sleep masks
- Limited battery life for all-night use scenarios
- Compression and heat may feel intense for some users
- Requires separate headphones for audio therapy integration
- Higher price point than therapeutic heat masks without biometric features
- Best results require app engagement and structured routine adherence
The Verdict: Choose Based on Your Sleep Problem
The Manta Sound and Therabody SmartGoggles succeed at fundamentally different objectives. Comparing them feels like comparing a precision tool to a therapeutic device, both well-designed but serving distinct purposes.
Choose the Manta Sound if your primary sleep obstacles involve environmental control. You need darkness and audio content simultaneously. You’re a side sleeper who finds most audio sleep solutions uncomfortable. You want a device you can wear all night without awareness. You prioritize battery life and simple functionality.
Choose the SmartGoggles if your sleep problems connect to physical tension and stress. You suffer frequent headaches or eye strain. You respond well to heat therapy and massage. You prefer structured pre-sleep routines over passive interventions. You’re willing to engage with app-guided protocols.
After years of managing anxiety-driven sleep issues, I’ve learned that acceptance matters more than optimization. Getting upset about not sleeping is like getting upset that it’s raining outside. Both these devices work best when they support your natural sleep process rather than forcing it.
The “best” choice depends entirely on which specific obstacles prevent your sleep. Audio environmental control or physical tension release. Neither device guarantees better sleep, but both remove specific barriers that might be keeping you awake.
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