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Oura Ring Gen3 Horizon - Black
Monitor your sleep, activity levels, temperature trends, stress, heart rate, and more with the most trusted smart ring. Whether you’re focusing on your fitness or want to improve your sleep, Oura helps you take control of your health — in style.
In stock. Next day delivery available.
Healf Zone members get free next day delivery on all orders.
Buy now, pay later from £49.75/mo
Find your size
Oura Ring Gen3 sizing is unique from other rings, including Oura Ring 4.
Key Benefits
-
Accurately measures over 20 key biometrics with research-grade sensors.
-
Provides personalised health insights with the Oura App.
-
Long battery life.
-
Durable and water-resistant up to 100m.
-
Comfortable to wear and non-allergenic.
SIZE BEFORE YOU BUY. It is highly recommended that you use the Gen3 Sizing Kit to ensure the perfect fit before purchasing your Oura Ring. The Gen3 Sizing Kit is available at Healf.
The Oura Ring Gen3 is a stylish and intuitive wellness tracker crafted to help you take control of your health. With research-grade sensors, it tracks over 20 key biometrics, giving you detailed insights into your well-being around the clock. It monitors vital metrics such as resting heart rate, heart rate variability, respiration, and skin temperature, while infrared LEDs measure blood oxygen levels during your sleep, offering a complete picture of your health.
Worn day and night, the Oura Ring syncs effortlessly with the Oura app, where you can view personalised Readiness and Sleep Scores. These scores give you clarity on whether you're ready to take on the day or need some extra rest.
The Oura Ring also tracks your daily activity, helping you stay on top of your fitness goals. Plus, it offers valuable insights into menstrual cycles and fertility, seamlessly integrating with trusted apps like Flo and Clue.
With a 7-day battery and 80-minute charge, this smart ring lets you track your health without interruptions. Made from durable, lightweight titanium, it's non-allergenic, comfortable, water-resistant up to 100m, and withstands a variety of temperatures like saunas and ice baths–making it the perfect companion for your wellness journey.
The Oura Ring Gen3 Horizon features a sleek, circular design.
What’s Included:
1x Oura Ring Gen3 Horizon (Gold).
1x size-specific charger and USB-C cable.
The Oura Ring integrates advanced technology with a deep understanding of wellness, offering a truly holistic approach to health tracking. Backed by an in-house team of over 20 PhDs, the rings were refined across four generations, each version smarter, lighter, and more durable than the last, trusted by millions of users worldwide. Its research-grade sensors, comparable to those used in sleep labs, provide highly accurate to ensure you get reliable insights for your wellbeing.
The ring also continuously fine-tunes your health data, delivering increasingly personalised feedback the longer it’s worn. Additionally, each Oura Ring is made from aerospace-grade titanium, one of the strongest materials on earth. Years of testing guarantee they're comfortable to wear and will last long– making them a reliable partner that powers your lifelong health journey.
Born in the happiest country in the world, Oura is the wellness brand behind the revolutionary Oura Ring and Oura App. Combining Finnish craftsmanship with cutting-edge technology, its mission is simple: to make health a daily practice. That’s why they created a tool that fits seamlessly into daily life, offering clear insights to support wellbeing. Empowering individuals to take control of their health, Oura guides everyone on their journey, helping them make informed decisions and lead better, healthier lives.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
WEARING YOUR OURA RING
The Oura Ring is designed for all-day comfort and can be worn 24/7.
TIP: Before purchasing the Oura Ring Gen3, it's a good idea to use the Oura Ring Sizing Kit (sold separately). This custom sizer helps you find the perfect fit, ensuring a more comfortable and accurate health tracking experience.
To avoid discomfort or unintended scratching, it is not recommended to wear the Oura Ring next to other rings.
For optimal wear, it is advised to use the Oura Ring on the non-dominant hand. This minimises friction and helps protect the ring from scratches caused by daily interactions with objects and surfaces.
WATER RESISTANCE
The Oura Ring is water-resistant up to 100 metres (approximately 330 feet).
It can be worn while showering, swimming, or engaging in recreational diving activities such as snorkelling. However, it is not recommended for scuba diving or for submersion underwater for more than 12 hours.
TEMPERATURE GUIDELINES
The Oura Ring operates effectively within a temperature range of -10°C to 52°C (14°F to 125°F).
It can be safely worn in the shower, hot tubs, saunas, ice baths, and cryotherapy tanks. However, prolonged exposure to extreme temperatures—below -20°C (-4°F) or above 60°C (140°F)—may damage the ring’s battery.
BATTERY LIFE
For the Oura Ring Generation 3, a full charge provides up to seven days of battery life.
CARE AND MAINTENANCE
To clean the Oura Ring, use a small amount of mild dish soap and water, then rinse thoroughly.
Ensure both the ring and hands are completely dry before wearing it again.
Hand sanitiser is safe to use with the ring. For more thorough hand-washing routines, remove the ring while scrubbing and clean it separately as you would other jewellery.
Don’t leave the ring exposed to heat for extended periods.
Don’t puncture the Oura Ring or its battery.
SPECIFICATIONS
HARDWARE:
Styles and Sizes
Oura Ring Generation 3 is available in two styles and sizes 6–13.
Gen3 Horizon: Features a sleek, uninterrupted design with a dimple on the bottom for optimal finger placement. Available in six finishes.
Gen3 Heritage: Features a classic plateau design. Available in four finishes.
Each Oura Ring includes a size-specific charger and charging cable.
Fit and Sensor Alignment
For the best fit and accurate sensor readings, align the ring so the sensor bumps are against the palm side of your finger.
SENSORS:
Green and red LEDs, along with infrared (IR) LEDs, allow for measurements of daytime and activity heart rates.
Extra negative temperature coefficient (NTC) sensors measure differences in skin temperature, enabling Cycle Insights and improved illness detection.
An additional IR sensor ensures accurate readings by compensating for suboptimal alignment.
Accelerometers detect daily activity, steps, and common workout types.
The Gen3 Charger features colour-coded LEDs for improved charging status displays.
MATERIALS:
External Surface
Made of titanium with physical vapour deposition (PVD) coating in Gold, Silver, Rose Gold, and Brushed Titanium finishes.
Titanium with Diamond-like Carbon (DLC) coating available in Black and Stealth finishes.
Inner Surface
Features a medical-grade, BPA-free, non-allergenic, and non-metallic seamless inner moulding.
Shock-resistant bonding between the printed circuit board and the ring's outer frame ensures durability.
OTHER SPECIFICATIONS:
Battery: Lasts up to 7 days. Battery life may vary depending on ring age and feature usage. See Ring Battery Tips for more details.
Width: 7.9mm.
Thickness: ~2.7mm (Gen3 Heritage), ~2.9mm (Gen3 Horizon).
Weight: 4–6 grams, depending on ring size
Oura Ring Gen3 Horizon - Black
Monitor your sleep, activity levels, temperature trends, stress, heart rate, and more with the most trusted smart ring. Whether you’re focusing on your fitness or want to improve your sleep, Oura helps you take control of your health — in style.
In stock. Next day delivery available.
Healf Zone members get free next day delivery on all orders.
Buy now, pay later from £49.75/mo
Find your size
Oura Ring Gen3 sizing is unique from other rings, including Oura Ring 4.
Key Benefits
-
Accurately measures over 20 key biometrics with research-grade sensors.
-
Provides personalised health insights with the Oura App.
-
Long battery life.
-
Durable and water-resistant up to 100m.
-
Comfortable to wear and non-allergenic.
SIZE BEFORE YOU BUY. It is highly recommended that you use the Gen3 Sizing Kit to ensure the perfect fit before purchasing your Oura Ring. The Gen3 Sizing Kit is available at Healf.
The Oura Ring Gen3 is a stylish and intuitive wellness tracker crafted to help you take control of your health. With research-grade sensors, it tracks over 20 key biometrics, giving you detailed insights into your well-being around the clock. It monitors vital metrics such as resting heart rate, heart rate variability, respiration, and skin temperature, while infrared LEDs measure blood oxygen levels during your sleep, offering a complete picture of your health.
Worn day and night, the Oura Ring syncs effortlessly with the Oura app, where you can view personalised Readiness and Sleep Scores. These scores give you clarity on whether you're ready to take on the day or need some extra rest.
The Oura Ring also tracks your daily activity, helping you stay on top of your fitness goals. Plus, it offers valuable insights into menstrual cycles and fertility, seamlessly integrating with trusted apps like Flo and Clue.
With a 7-day battery and 80-minute charge, this smart ring lets you track your health without interruptions. Made from durable, lightweight titanium, it's non-allergenic, comfortable, water-resistant up to 100m, and withstands a variety of temperatures like saunas and ice baths–making it the perfect companion for your wellness journey.
The Oura Ring Gen3 Horizon features a sleek, circular design.
What’s Included:
1x Oura Ring Gen3 Horizon (Gold).
1x size-specific charger and USB-C cable.
The Oura Ring integrates advanced technology with a deep understanding of wellness, offering a truly holistic approach to health tracking. Backed by an in-house team of over 20 PhDs, the rings were refined across four generations, each version smarter, lighter, and more durable than the last, trusted by millions of users worldwide. Its research-grade sensors, comparable to those used in sleep labs, provide highly accurate to ensure you get reliable insights for your wellbeing.
The ring also continuously fine-tunes your health data, delivering increasingly personalised feedback the longer it’s worn. Additionally, each Oura Ring is made from aerospace-grade titanium, one of the strongest materials on earth. Years of testing guarantee they're comfortable to wear and will last long– making them a reliable partner that powers your lifelong health journey.
Born in the happiest country in the world, Oura is the wellness brand behind the revolutionary Oura Ring and Oura App. Combining Finnish craftsmanship with cutting-edge technology, its mission is simple: to make health a daily practice. That’s why they created a tool that fits seamlessly into daily life, offering clear insights to support wellbeing. Empowering individuals to take control of their health, Oura guides everyone on their journey, helping them make informed decisions and lead better, healthier lives.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
WEARING YOUR OURA RING
The Oura Ring is designed for all-day comfort and can be worn 24/7.
TIP: Before purchasing the Oura Ring Gen3, it's a good idea to use the Oura Ring Sizing Kit (sold separately). This custom sizer helps you find the perfect fit, ensuring a more comfortable and accurate health tracking experience.
To avoid discomfort or unintended scratching, it is not recommended to wear the Oura Ring next to other rings.
For optimal wear, it is advised to use the Oura Ring on the non-dominant hand. This minimises friction and helps protect the ring from scratches caused by daily interactions with objects and surfaces.
WATER RESISTANCE
The Oura Ring is water-resistant up to 100 metres (approximately 330 feet).
It can be worn while showering, swimming, or engaging in recreational diving activities such as snorkelling. However, it is not recommended for scuba diving or for submersion underwater for more than 12 hours.
TEMPERATURE GUIDELINES
The Oura Ring operates effectively within a temperature range of -10°C to 52°C (14°F to 125°F).
It can be safely worn in the shower, hot tubs, saunas, ice baths, and cryotherapy tanks. However, prolonged exposure to extreme temperatures—below -20°C (-4°F) or above 60°C (140°F)—may damage the ring’s battery.
BATTERY LIFE
For the Oura Ring Generation 3, a full charge provides up to seven days of battery life.
CARE AND MAINTENANCE
To clean the Oura Ring, use a small amount of mild dish soap and water, then rinse thoroughly.
Ensure both the ring and hands are completely dry before wearing it again.
Hand sanitiser is safe to use with the ring. For more thorough hand-washing routines, remove the ring while scrubbing and clean it separately as you would other jewellery.
Don’t leave the ring exposed to heat for extended periods.
Don’t puncture the Oura Ring or its battery.
SPECIFICATIONS
HARDWARE:
Styles and Sizes
Oura Ring Generation 3 is available in two styles and sizes 6–13.
Gen3 Horizon: Features a sleek, uninterrupted design with a dimple on the bottom for optimal finger placement. Available in six finishes.
Gen3 Heritage: Features a classic plateau design. Available in four finishes.
Each Oura Ring includes a size-specific charger and charging cable.
Fit and Sensor Alignment
For the best fit and accurate sensor readings, align the ring so the sensor bumps are against the palm side of your finger.
SENSORS:
Green and red LEDs, along with infrared (IR) LEDs, allow for measurements of daytime and activity heart rates.
Extra negative temperature coefficient (NTC) sensors measure differences in skin temperature, enabling Cycle Insights and improved illness detection.
An additional IR sensor ensures accurate readings by compensating for suboptimal alignment.
Accelerometers detect daily activity, steps, and common workout types.
The Gen3 Charger features colour-coded LEDs for improved charging status displays.
MATERIALS:
External Surface
Made of titanium with physical vapour deposition (PVD) coating in Gold, Silver, Rose Gold, and Brushed Titanium finishes.
Titanium with Diamond-like Carbon (DLC) coating available in Black and Stealth finishes.
Inner Surface
Features a medical-grade, BPA-free, non-allergenic, and non-metallic seamless inner moulding.
Shock-resistant bonding between the printed circuit board and the ring's outer frame ensures durability.
OTHER SPECIFICATIONS:
Battery: Lasts up to 7 days. Battery life may vary depending on ring age and feature usage. See Ring Battery Tips for more details.
Width: 7.9mm.
Thickness: ~2.7mm (Gen3 Heritage), ~2.9mm (Gen3 Horizon).
Weight: 4–6 grams, depending on ring size
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Frequently asked questions
Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.
The Healf Source offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.
We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.
Healf Curation Process™
Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.
The Discovery
Expert Validation
Community Testing
The Discovery
Expert Validation