Oura Wearable
Oura Ring 4
4.3 out of 5Sauna Monthly verdictOura's titanium smart ring tracks heart rate 24/7 along with HRV, temperature trends, blood oxygen and sleep staging, and its readiness score shows how your body absorbs sauna and cold plunge stress overnight. Membership runs $5.99/month after the first free month.
- Wearable
$349+
50% below the median for recovery & tracking.
We may earn a commission when you buy through this link, and you pay the same price. Price as recorded in our catalogue on Oct 5, 2026.
Good to know: Oura says the ring is safe to wear in a sauna and rates it to 52°C (125°F).
4.3
Out of 5 · Our rating
Sauna Monthly verdict
“Oura says this screenless ring is safe to wear in a sauna and rates it to 52°C (125°F).”
Oura's ring is best at the multi-week trend, showing resting heart rate drifting down and sleep improving as you adapt to regular heat. Oura says it's safe to wear in a sauna and rates it to 52°C (125°F), with a warning that long exposure above 60°C (140°F) may damage the battery. The metal conducts heat to your finger, so take it off if it gets hot. You'll pay a subscription on top, and we'd treat any reading taken inside the sauna as noise.
See it in action
Introducing Oura Ring 4: Sleeker. Smarter. Made for you.
Oura Ring 4: Getting Started
By the numbers
Price in context
Where it sits among the 9 recovery & tracking we list
At $349, the Oura Ring 4 starts 50% below the median for recovery & tracking. The cheapest is the WHOOP 5.0 at $199, and the dearest the Clearlight FULL BODY Red Light Therapy Tower at $2,594.
What to know before you buy
What each of these means once it's in use.
- WearableA wearable tracks HRV and resting heart rate along with sleep, so you can see what heat and cold sessions change.
Specifications
From Oura’s own listing, checked when the page was written.
| Brand | Oura |
|---|---|
| Model | Oura Ring 4 |
| Type | Wearable |
| Materials | Wearable |
| List price | $349+ |
| Where to buy | Oura |
| Price recorded | Oct 5, 2026 |
How it compares
The Oura Ring 4 beside the 3 closest models in our recovery & tracking.
| Product | |  |  |  |
|---|---|---|---|---|
| Price | $349+ | $199–$359/yr | $1,295 | $349 |
| Heat | n/a | n/a | Near-Infrared | Red Light |
| Our rating | 4.3 / 5 | 4.2 / 5 | n/a | n/a |
| Links | Buy | See it | See it | See it |
Oura Wearable
Buy the Oura Ring 4
$349+
Buy at OuraWe may earn a commission when you buy through this link, and you pay the same price.
Where we’ve written about it
The Science
The science of sauna: what 20 years of Finnish research found
The KIHD cohort followed 2,315 men for two decades, and the more often they used the sauna, the lower their risk of dying. That link is observational and can't prove cause.
11 min read
Recovery & Tracking
What a wearable shows as your body adapts to sauna heat
Three weeks of post-exercise sauna raised trained runners' endurance 32% in one study. A ring or band lets you watch the same adaptation in your own resting heart rate.
5 min read
Recovery & Tracking
Can you wear a WHOOP in the sauna? Only where the air stays under 140°F
WHOOP, Apple and Oura each publish a heat limit, and a traditional sauna runs past all of them. We read each maker's guidance and explain what the heat does to the hardware and to the readings.
5 min read
