Real-time HRV training that fits with your life.
Edge finds your personal optimal breathing rhythm and guides you into it in real time — syncing heart, lungs, and nervous system into coherence. Calm, focus, and resilience on demand.
Currently out of stock · Estimated 60-day delivery
Your breath. Your rhythm. Your results.
Edge finds your personal resonance frequency — the breathing rate where heart and breath move as one — then keeps you in it through gentle lens feedback.
Pair Edge with the Narbis ear clip for everyday training, or a Polar H10 chest strap for active training. Both read your beat-to-beat rhythm.
The patented algorithm finds your personal resonance frequency — the precise breathing rate, unique to your physiology, that maximizes coherence.
The lenses pace your breath — tinting to inhale, clearing to exhale — at your resonance frequency. No screen, no headphones. The tint also tracks coherence in real time.
A few minutes a day builds lasting autonomic control. Your baseline HRV rises and calm gets easier to reach — the same self-regulation athletes use to find their zone.
Choose your sensor. The lens does the work.
Whichever sensor you choose, the feedback lives in the lenses — so your eyes stay on the world, not a phone.
*Final appearance may differ from image
Narbis Edge Ear Clip
Lightweight and discreet. Clips on and reads your pulse optically — ideal for daily training at your desk or before you head out.
Polar H10 Chest Strap
Already own a Polar H10? Edge connects to it for rock-solid ECG accuracy — plus heart-rate-zone training through the same lenses. (Not included — sold separately by Polar)
Standalone Mode
Prefer to train without a sensor? Edge also runs guided-breathing training on its own — the lenses pace you through a rhythm personalized to you.
Interested in brain training?
Edge also integrates with EEG neurofeedback devices — the same screen-free lenses become real-time feedback for brain training. Narbis also makes dedicated EEG neurofeedback smart glasses for deeper attention training.
EEG brainwave feedback — through the same lenses
Two tints. Your choice.
The tint paces your breath and tracks coherence in real time — clear when you’re in sync, tinting more as you drift.
Gray · Calm
A neutral, true-color tint that lowers brightness and glare — an even, low-stimulation view for winding down.
Yellow · Clarity
A warm, amber tint that filters blue light and lifts contrast — many prefer it for daytime and active training.
Ten minutes before the moments that matter.
A daily reset
Sit, clip on, and let the lenses pace you. A short, repeatable training that fits between everything else.
Right before
Before the putt, the start line, the meeting, or the conversation — arrive already settled instead of trying to calm down mid-moment.
Recovery
Wind down after a workout or competition. Use HRV coherence training to shift your nervous system from go-mode back to rest — accelerating recovery through the lenses.
Decades of research. Made wearable.
Breathing at your body’s resonance frequency improves HRV, lowers stress, and builds resilience. Researchers have known this for 30+ years. Edge just makes it easy to do — the lenses guide you there and keep you there, no screen or coach required.
References: Lehrer & Gevirtz (2014), Frontiers in Psychology 5:756. Goessl, Curtiss & Hofmann (2017), Psychological Medicine 47(15):2578–2586. Narbis Edge is a wellness product and is not intended to diagnose, treat, cure, or prevent any disease.
One device. No subscriptions.
Start with the glasses, or add the ear clip for personalized live feedback. Everything the app does is included — forever.
Edge + Ear Clip
- Narbis Edge electrochromic glasses
- Wireless optical ear-clip sensor
- Personalized resonance-frequency calibration
- Live coherence feedback through the lenses
- Companion app for iOS & Android
- Standalone guided-breathing mode
Out of stock · Estimated 60-day delivery · Gray or yellow tint
Edge Glasses Only
- Narbis Edge electrochromic glasses
- Guided-breathing program — no sensor needed
- Connects to Polar H10 you already own
- Companion app for iOS & Android
- Free software updates, no subscription
Out of stock · Estimated 60-day delivery · Add ear clip anytime
Ear Clip Add-On
- Wireless PPG ear-clip sensor
- Enables personalized HRV biofeedback
- Measures heart rate variability in real time
- Bluetooth connection to Edge glasses
Out of stock · Estimated 60-day delivery
Coach, clinician, or studio? Explore Narbis Edge Pro →