Thermophore Liberty II Plus (USA Assembled) Automatic Moist Heating Pad (Large, Model 355)
Since 1931: America’s Trusted Heating Pad!
| Feature | Thermophore Liberty II Plus (Model 355) | Generic Heating Pads |
|---|---|---|
| Size | 14" x 27" – Full Back Coverage | 10" x 12" – Limited Area |
| Weight | 4 lbs – Weighted for Deep Contact | Under 2 lbs – Easily Shifts |
| Moist Heat | Yes – No Water Needed | Dry Heat or Manual Dampening |
| Heat Control | Constant-Comfort™ Switch (Hands-Free) | Basic On/Off or Toggle |
| Auto Shut-Off | Yes – 25 Minutes | Often Missing or Inconsistent |
| Contours to Body | Yes – Flexible & Body-Conforming | No – Flat and Rigid |
| Assembled In |
USA
|
Typically Overseas |
| Warranty | 2 Years | Varies – Often 1 Year |
Experience fast, penetrating pain relief with the Thermophore Liberty II Plus Model 355, a large, professional-grade moist heating pad designed to deliver deep-acting therapy where you need it most. Assembled in the USA, this premium heating pad combines size, weight, and body-conforming comfort to outlast and outperform generic heat packs.
The weighted fill ensures close, even contact against the body, helping the heat penetrate deeper into sore muscles and stiff joints. The contoured, flexible design molds naturally to your body — whether wrapped around the spine, hips, or shoulders — for consistent, targeted relief. Featuring Thermophore’s patented Constant-Comfort™ switch, it gives you hands-free control of heat intensity, without the need to constantly hold a button.
Perfect for chronic pain, arthritis, and recovery from injury, the Liberty II Plus delivers therapeutic-grade relief trusted by professionals in a home-ready package.
Key Features:
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Large 14" x 27" coverage area targets back, hips, or shoulders
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Weighted design stays firmly in place for deeper, more effective heat therapy
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Contours to the body for consistent contact and targeted relief
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Delivers penetrating moist heat without the need to add water
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Constant-Comfort™ switch offers hands-free control of heat intensity
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25-minute auto shut-off for built-in safety
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Heats quickly, reaching up to 165°F for fast relief
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Soft, washable fleece flannel cover included
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Trusted by physical therapists and medical professionals
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Assembled in the USA with durable, high-quality components
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Includes 2-year limited warranty
Compare Differences between Thermophore 355 and 155 Models
| Key Difference | Liberty 355 | MaxHEAT 355 | Liberty 155 |
|---|---|---|---|
| Size | 14" x 27" with Comes with a 3-layer cover and wash cloth that allows you to add moisture if needed in dry or heavily air conditioned climates. |
14" x 27" with Comes with a 3-layer cover and wash cloth that allows you to add moisture if needed in dry or heavily air conditioned climates. | 14" x 27" |
| Heat Control | 3 heat settings (switch) | 3 heat settings (switch) | 3 heat settings (switch) |
| Design Purpose | Covers upper back & shoulders | Covers upper back & shoulders | Covers upper back & shoulders |
| Country Assembled In | USA | China | USA |
| Learn More | Learn More |
What Is Moist Heat Therapy?
Moist heat therapy uses water vapor to conduct heat deeper into muscles and tissues than dry heat (like a standard heating pad or heat wrap). It’s commonly recommended by physical therapists and pain specialists for more effective, longer-lasting relief.
Benefits of Moist Heat Therapy:
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Penetrates deeper than dry heat
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Increases blood flow to promote healing
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Relaxes stiff joints and muscle spasms
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Eases chronic pain from arthritis, fibromyalgia, or injury
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Reactivates natural lubrication in joints and connective tissues
When to Use Moist Heat Therapy
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After the first 48–72 hours of an injury (once swelling is down)
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For chronic conditions like arthritis, back pain, or sciatica
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To relieve muscle tension, soreness, or spasms
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Before stretching or exercising tight muscles
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During recovery from sports injuries or overuse
⚠️ Avoid using heat on fresh injuries, swelling, or open wounds—use cold therapy first, then switch to heat once inflammation has decreased. Always consult your doctor or healthcare provider for proper guidance when treating injuries.
Why Does the Thermophore Have a 25-Minute Timer?
The 25-minute auto shut-off is a safety feature designed to:
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Prevent overheating or burns from extended use
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Avoid falling asleep with the pad on (a common misuse risk)
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Follow clinically recommended therapy intervals (15–30 minutes)
Thermophore pads reach higher temperatures than generic brands, so limiting exposure to 25 minutes at a time provides safe, effective relief without risk of skin damage or overheating.
Why This Model Outperforms the Rest:
Unlike flimsy, underpowered heating pads, the Thermophore Liberty II Plus Model 355 delivers professional-grade relief with serious weight, size, and heat. Its weighted, contoured design ensures full contact for deep, penetrating moist heat—not the surface warmth you get from generic brands. With its hands-free Constant-Comfort™ switch, fast heat-up, and USA-assembled build quality, this pad is engineered for long-lasting results, not one-season use.
If you're tired of pads that shift, cool off quickly, or barely reach the pain—this is your upgrade.
⚠ This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov