ThermaFlex™
ThermaFlex™
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Shipping Details
Shipping Details
Ships in 5-7 days
Our Guarantee
Our Guarantee
At GrindFuel, we back our gear with grit. If ThermaFlex doesn’t deliver the heat, relief, and performance you need, send it back within 30 days — no stress, no hassle, just guaranteed results.
Specifications
Specifications
Heat Levels: Low / Medium / High (up to 60°C / 140°F)
Massage Modes: 3 adjustable vibration settings
Power Source: USB-powered (wall adapter or power bank compatible)
Material: Soft-touch neoprene with breathable mesh lining
Fit: Adjustable for waists from 26” to 48”
Weight: Under 1 lb –ultra-portable for gym or travel
Unlock serious core recovery with ThermaFlex: Heat That Hits Where It Hurts.
Relief That Moves How You Do. The electric heating massage belt designed for athletes, lifters, and anyone grinding through lower back pain or muscle fatigue. Combining soothing heat therapy with rhythmic vibration massage, ThermaFlex delivers deep relief where it counts. Built with flexible materials and an ergonomic wrap-around fit, it moves with your body — whether you're recovering at home, cooling down post-workout, or powering through the daily hustle.
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3x the Healing Power
- Red light therapy
- Massage
- Heat therapy
Built In Massage
- Built-in vibration massage for extra recovery power
Adjustable Heat Therapy
- Adjustable Heat levels for targeted warmth and muscle relaxation
Comfortable Fit
- Secure wrap closure fits most body types and stays in place during movement
- ThermFlex outperforms competitors with unmatched heat retention, vibration massage, and all-day comfort that never quits.
Frequently Asked Questions
How hot does the ThermaFlex belt get?
ThermaFlex features multiple heat settings, reaching up to 60°C (140°F) — perfect for loosening tight muscles and easing lower back pain.
Does it massage as well as heat?
Yes! It combines vibrating massage nodes with heat therapy to enhance
circulation, reduce soreness, and maximize relaxation.
Can I wear it under clothes?
Absolutely. ThermaFlex is designed to be slim, lightweight, and discreet, so you can wear it under a hoodie or shirt without bulk.
Is it rechargeable or does it stay plugged in?
It’s USB-powered, meaning you can plug it into a power bank, car charger, or
wall outlet — super portable for home, work, or gym use.
What areas does it cover?
It’s optimized for the lower back and waist, but it can also be wrapped around abs, obliques, or hips depending on your recovery needs.