RIP Kyle Busch 1985 2026 Memorial T-Shirt HRT987P

RIP Kyle Busch 1985 2026 Memorial T-Shirt HRT987P

 (500+ Reviews)
$24.99
$24.99
SAVE Liquid error (snippets/price line 119): Computation results in '-Infinity'% Sold out

Riffculture Ring tracks 140+ biosignals and 13+ health features, from ECG to AI coaching. A subscription-free health lab on your finger, with blood pressure and glucose trends coming soon.

⌁

Clinical-level ECG & AFib Detection

On-demand heart rhythm monitoring.

✦

Kira™ AI Health Coach

Actionable insights and wellness suggestions tailored to your body.

▣

No Subscription Fees

All vital features included. No hidden costs.

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UNTIL MIDNIGHT ONLY

RIP Kyle Busch 1985 2026 Memorial T-Shirt HRT987P

RIP Kyle Busch 1985 2026 Memorial T-Shirt HRT987P

$24.99
$24.99
SAVE Liquid error (snippets/price line 119): Computation results in '-Infinity'% Sold out
  • American Express
  • Apple Pay
  • Bancontact
  • BLIK
  • Diners Club
  • Discover
  • EPS
  • Google Pay
  • JCB
  • Maestro
  • Mastercard
  • Multibanco
  • MobilePay
  • PayPal
  • Przelewy24
  • Shop Pay
  • Twint
  • Union Pay
  • Visa

Blood Pressure Monitoring

Track your blood pressure trends. Understand how stress,
sleep, and activity affect your heart health over time. 
Coming as a premium feature in early 2026.

Glucose Trend Monitoring

Stay ahead of your blood sugar fluctuations with non-invasive tracking. Ideal for those managing energy levels, metabolism, or early glucose sensitivity. Planned for mid 2026, as a premium feature.

ECG + AFib Detection

Track your heart rhythm with world’s first medical-grade technology and catch signs of arrhythmia before symptoms appear.

Sleep Tracking

Monitor sleep stages, breathing, and oxygen levels to understand how well your body recovers overnight.

Women’s Health

Keep track of your cycle, hormonal shifts, and fertility with personalized insights based on your vitals.

Stress & Energy Monitoring

See how stress affects your body and get guidance on when to rest or push harder.

Advanced analytics

Make graphs overlap and understand how different metrics are linked.

Energy monitoring

Get stats and in depth insights about your energy levels.

Live measurement

On-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.

Alarm clock

Wakes you up with a smart alarm during your lightest sleep stage with your phone's vibrations.

Guided breathing

Launch guided breathing exercises to relax, sleep better, and more.

Vital alerts

Get notified when you vitals are going off.

Medication

Never forget to take your meds anymore and keep track of your intakes.

Coherence

Dive into a state of optimal function and regulate your emotions and clarity.

Sport Sessions

Track outdoor activities with a GPS trace and reports.

Airplane Mode

Disable ring’s Bluetooth communication.

Timer

Set a timer for your workout or anything else.

Calendar

Add manual notes that are reflected in the app and add context to your data.

Heart Rate + HRV

24/7 heart rate & morning resting heart rate and heart rate variability.

Breathing Rate

Breathing rate during sleep periods.

Blood oxygenation

Medical grade SpO2 levels during sleep & rest periods.

Temperature

Temperature variations trends help detect fever, menstrual cycles.

Kira™ Coaching

Your AI health coach turns complex data into clear, actionable tips tailored to your lifestyle.

Battery & Charging

Wear it for up to 8 days straight. Then wirelessly recharge in just 30 minutes.

  • Riffculture Ring 2 
  • Wireless Charging Case
  • USB-C cable
  • Cleaning Cloth
  • App Access 
  • Digital User Guide

Titanium body, hypoallergenic interior

2.55mm thick, 7.8mm wide, 3 grams

Sizes: US 6–14

Battery: 8 days (Power Mode), 5 days (Performance)

Charging: 30 mins via wireless charger

ECG, PPG, temp sensor, 3x accelerometer

Bluetooth Low Energy, Airplane Mode

iOS & Android compatible

View full details

13+ Advanced Health Features

Every key signal your body gives — tracked, analyzed, and translated into real guidance.

ECG AFib Detection
♥

ECG + AFib Detection

Track your heart rhythm and catch signs of arrhythmia before symptoms appear.

Kira Coaching
✦

Kira™ Coaching

Your AI health coach turns complex data into clear, actionable tips tailored to your lifestyle.

Sleep Tracking
☾

Sleep Tracking

Monitor sleep stages, breathing, and oxygen levels to understand your recovery overnight.

Stress Monitoring
⚡

Stress & Energy

See how stress affects your body and get guidance on when to rest or push harder.

Heart Rate HRV
⌁

Heart Rate + HRV

Track 24/7 heart rate and heart rate variability for better wellness insights.

Blood Oxygenation
💧

Blood Oxygenation

Monitor SpO₂ levels during sleep and rest periods for deeper health awareness.

Sizing

Riffculture Ring Size Chart

Size Inner Diameter
(mm)		 Perimeter
(mm)
#7 17.5mm 55mm
#8 18.3mm 57.5mm
#9 19.1mm 60mm
#10 20mm 62.8mm
#11 20.8mm 65.4mm
#12 21.6mm 67.8mm
#13 22.4mm 70.4mm

How to measure your size

Wrap paper around finger

STEP 1:

Take a long non-elastic rope or paper, and wrap it around your finger.

Fit paper to finger

STEP 2:

Make the rope or paper fit closely to your finger. Avoid being too loose or too tight.

Mark the paper

STEP 3:

Mark the junction point on the rope or paper.

Measure paper length

STEP 4:

Lay the rope or paper flat, then measure the length. Measure multiple times for accuracy.

You wear the ring.
The app listens.
Kira responds.

The ring captures over 8 key health signals and the app turns those readings into clear, easy to understand insights. You see patterns in your recovery, energy, stress, and sleep without needing to decode anything.

And then, Kira, your AI health coach, watches for any changes in your vitals, spots early warning signs, and sends you gentle, helpful recommendations. No searching. No guessing. Kira already knows what matters and what to do next.

Download on the App Store Get it on Google Play

Technical Specs

Riffculture Smart Ring
↔

2.55mm thick, 7.8mm wide, 3 grams

⟲

Sizes: US 6–14

💧

Fully Waterproof

Withstands daily use in the shower, pool, or rain.

⚡

Battery: 7 Days

8 days Power Mode, 5 days Performance Mode.

🔋

Charging: 30 mins via wireless charger

📶

ECG, PPG, temp sensor, 3x accelerometer

ᛒ

Bluetooth Low Energy, Airplane Mode

📱

iOS & Android compatible

✓

GDPR & HIPAA compliant

▣

Titanium body, hypoallergenic interior

Finished with a durable PVD coating protecting it from scratches and wear.

Trusted by People Who Live Well

  • Choose size 8 fits well. . Could of probably go a size 9 for my index finger when the hot summer comes. Qr code available on the manual. Very easy to set up. Easy to go through the app. This my 2nd smart ring this one has more features which is why i purchased this ring. Wished it had gps tracking. Great price. Highly recommended.

  • Ring arrived in Italy in less than 10 days, beautiful, durable and above all functional, easily connectable to the device that measures heart rate, body temperature, oxygenation, stress for us women even during the menstrual phase, worn today and testing it for now, excellent, only downside I would have taken a size up to wear it on the index finger. I recommend the purchase, good price for the silver color, very beautiful.

  • I liked it a lot. The ring is beautiful and very functional. I just think it overestimates the number of steps. But the monitoring of oxygen, heart rate, and sleep are excellent.

  • Choose size 8 fits well. . Could of probably go a size 9 for my index finger when the hot summer comes. Qr code available on the manual. Very easy to set up. Easy to go through the app. This my 2nd smart ring this one has more features which is why i purchased this ring. Wished it had gps tracking. Great price. Highly recommended.

  • I've had this ring for a week now. I simply love it. I have noticed that its getting tight for my pointer finger. Planning on purchasing one size up size 9. highly recommend this smart ring. Wished that it has gps feature. Then this would be perfect. I should have used the ring sizer provide on the page.

  • Great price, fast delivery. Works great. You need to download qring app & the ring connects via bluetooth. The battery lasts for 4-5 days. You can recharge the ring using the case at least twice before you need to recharge the case. I got it mainly to measure my sleep pattern & it does that very well. The r09 is the best value for money. Thank you.

  • Love it so far! I get super overstimulated with big rings and i was scared it would be too thick but it honestly is so comfy, i got the smallest size and it fits my fingers well, the steps and heart rate are accurate, sleep timing is getting there (i’ve only been wearing for a few days so hopefully it gets more accurate)

  • Took only 8 days to 🇨 🇦 . I am wearing it on my middle finger that is a little less than 3” circumference and i ordered size 10. Fits great. Would prob would need size 11 for index finger. The gold is nice and it connected super fast to my iphone. App seems decent. Will have to wear for a while to see how well it works. Overall very happy!

  • I’m in love with this ring!!! It’s so beautiful and stunning, super easy to connect, reads my heart, oxygen, stress and activity fast and effective. Came super fast, highly recommend!!! Definitely going to order another one! !

  • Tested for a week, battery still at 40 percent after 4 days, took a shower and washed my hands without any problems, connects every time, what can I say, very good and perfect measurements, sockets as shown in the photo.

  • Using it for 4 days... Pretty cool... I hate watches, so the ring allows me to measure some health metrics... it's been working very well and the battery lasts 3 to 4 days and charges to 100% in 30 minutes.