the #1 device for knee discomfort
The RumFlex™
The RumFlex™
Experience fast relief from knee pain with the ultimate 3-in-1 solution — vibration massage, heat therapy, and red light, all in one powerful, portable device.
✔️ Variable Massage Therapy
✔️ Thermotherapy (Heat Therapy)
✔️ Medical-Grade Red Light Therapy
✔️ 100% Money Back Guarantee
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- Free Shipping
- 30 Days Return
- Secure Checkout
RumFlex™ combines the power of deep heat, red light therapy, and vibration massage to target knee discomfort at its source. This dynamic trio boosts circulation, reduces stiffness, and accelerates recovery—allowing you to stay active and pain-free, without the need for medication.
📏 RumFlex™ Sizes:
📏 RumFlex™ Sizes:
- Knee Circumference Range: 33 cm – 48 cm (13” – 19”)
- Brace Height: Approximately 22 cm (8.7”)
- Fully Adjustable: Strong velcro straps ensure a snug, secure fit for most leg sizes — suitable for both men and women
🧵 Materials & Quality:
🧵 Materials & Quality:
- Soft Neoprene Fabric – Breathable and skin-friendly for all-day comfort
- Adjustable Velcro Straps – Secure fit for all knee sizes
- Medical-Grade LEDs – 660nm & 850nm red light for deep tissue relief
- Reinforced Stitching – Durable and built for daily use
- Lightweight Design – Flexible and easy to move in
✅ Built for daily use without irritation, overheating, or wear and tear.
🚚 Shipping & Delivery:
🚚 Shipping & Delivery:
- Free Insured Shipping on all orders
- Tracking Provided: You’ll receive a tracking link once your order ships
- Estimated Delivery Time: 5–8 business days, depending on your location
- Peace of Mind: Every shipment is fully insured and trackable
➡️ For more details, please head to our Shipping Policy.
🔁 Returns & Guarantee:
🔁 Returns & Guarantee:
- 30-Day Money-Back Guarantee
If you're not completely satisfied, you can return your order within 30 days of receiving it for a full refund.
No stress, no hassle — your satisfaction is our top priority.
- 90-Day Warranty on All Products
We proudly stand behind our quality. Every product is backed by a full 90-day warranty covering any manufacturing defects or issues.
➡️ For more details, please head to ourRefund Policy.
What Customers Are Saying
The infrared and the massage features are awesome.. the heat levels are good and the Vibration comes from the sides. At first it did not feel strong... but therapy isn't fast and quick so after wearing it for 10 minutes you will then know that this knee massager works, I'm happy with my purchase.
I have lived with a sore knee for years. The pain ranges between annoying and moderate. After only two days use of this device my mobility is much improved. Love this. The battery life is great. After a full charge and 6 uses, it's still going strong.
I’ve tried so many products for my knee pain, and most were a waste of money. But this device actually made a difference. After two weeks, the swelling went down and I could move more easily. The heat and vibration feel amazing after a long day. It’s been the most effective, drug-free relief I’ve found.
Recover 3x Faster
Compared to Traditional Methods
The RumFlex™ Knee delivers three powerful therapies in one device to accelerate healing and reduce pain—up to 3x faster than conventional methods. Say goodbye to knee pain and start your journey to faster, lasting relief today.
Targeted Relief for Every Type of Knee Pain
Whether it's from sports injuries, swelling, joint pain, or cold-sensitive knees, RumFlex™ delivers heat and massage directly to the source. It reduces inflammation, eases discomfort, and speeds up recovery to help you get back on your feet faster.
All-in-One Joint Relief
Relieve pain and stiffness in your shoulders, knees, and elbows with RumFlex™. This powerful device combines heat, massage, and compression to enhance circulation and speed up recovery—targeting exactly where you need it most.
See the RumFlex™ in Action!
FAQ
Have Questions?
How does the See RumFlex™ work?
RumFlex™ combines infrared heat therapy, compression, and vibration massage to target deep tissues in the knee. This triple-action system helps reduce inflammation, relieve pain, enhance circulation, and support natural joint recovery.
Is it safe to use?
Yes, the RumFlex™is designed with safety in mind. It uses FDA-approved infrared therapy, which is non-invasive and poses minimal risk when used according to the manufacturer’s instructions. Always follow the guidelines for safe and effective use.
How often should I use it to see results?
For optimal results, it's recommended to use the RumFlex™ daily for 15–20 minutes. Most users begin to notice significant pain relief and improved mobility within 2–4 weeks of consistent use.
Can I use this if I have a pre-existing medical condition?
While the RumFlex™ is generally safe for most users, we recommend consulting with your healthcare provider before starting any new therapy — especially if you have a pre-existing medical condition or have had recent surgery.
What types of knee pain does it help with?
RumFlex™ can help relieve a wide range of knee issues, including arthritis, joint degeneration, tendonitis, ligament strain (ACL/MCL), meniscus tears, and general pain from overuse or aging.
How long does the battery last?
The RumFlex™ features a high-capacity battery that delivers up to 3 hours of continuous use per charge, making it ideal for daily use without constant recharging.
Can it be used on other areas of the body?
Although RumFlex™ is primarily designed for knee pain, its red light and heat therapy functions may also help relieve discomfort in other joints like the elbows or shoulders.
How do I clean and maintain RumFlex™?
Wipe the surface gently with a damp cloth and mild soap. Avoid submerging the device or using any harsh chemicals. Proper care ensures long-lasting performance.
What is your return policy?
We offer a 30-day money-back guarantee. If you’re not satisfied, simply contact our support team within 30 days for a refund or exchange—no questions asked.
For more information visit our Refund Policy
Still have questions?
No problem — you can email us at info@rumbelt.com
or chat with us live using the chat icon at the bottom right of your screen. We're always here to help.
the #1 device for knee discomfort
The RumFlex™
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Why Choose RUMBELT ?
-
30-Day Money-Back Guarantee
Not satisfied with your purchase? No worries. Return it within 30 days and get a full refund—no questions asked.
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Free Insured Shipping on Every Order
We cover the shipping—every time. Your order is fully tracked and insured from our door to yours, so you can shop with total confidence.
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95% Customer Satisfaction
Thousands have experienced the benefits of our infrared therapy—and 95% say they’d recommend it to others.
