Thermophore Liberty II Plus (USA Assembled) Automatic Moist Heating Pad — Large 14" × 27" (Model 355)
Thermophore Liberty II Plus (USA Assembled) Automatic Moist Heating Pad — Large 14" × 27" (Model 355)
The premium Thermophore — assembled in the USA with the Moisture-Plus 3-layer cover for reliable moist heat in any climate. Constant-Comfort™ hands-free switch with 3 heat settings, weighted ~4 lbs, up to 165°F, 25-minute auto shutoff. Includes a washcloth so you can add moisture manually in dry or heavily air-conditioned environments. Professional-grade pain relief since 1931.
I've broken so many sub-par heating pads over the years. They never get as hot as I need them to and their cords are flimsy. I finally decided to splurge on this one and I'm so glad I did! It's the heating pad of my dreams.
Our Take: The Liberty II Plus 355 is the premium Thermophore for people who want everything: USA assembly, hands-free 3-setting operation, and the Moisture-Plus cover that works in any climate. It shares the same 14" × 27" size, ~4 lb weighted body, 3 heat settings, 165°F max, and 25-minute auto shutoff as the Liberty 155. The difference is the cover. Standard Thermophore covers rely on ambient humidity and work perfectly in most homes. If you live in a very dry climate, run heavy air conditioning, or use the pad in a clinical environment, the Moisture-Plus 3-layer cover lets you insert a damp washcloth for supplemental moisture. The Constant-Comfort™ switch is hands-free — press once, select your setting, and relax. If you don't need the Moisture-Plus cover, the Liberty 155 delivers the same USA assembly at a lower price. For the same Moisture-Plus cover without USA assembly, the MaxHEAT Plus 355 is the value option.
Why You'd Choose the Liberty II Plus 355
- The 3-layer Moisture-Plus cover produces automatic moist heat from ambient humidity like all Thermophore covers. It also lets you insert a damp washcloth for supplemental moisture in very dry or heavily air-conditioned environments.
- The Liberty line has been assembled at the Thermophore facility in Fremont, Indiana since 1987. The 355 is the premium Moisture-Plus model in the Liberty line.
- Thermophore's patented Constant-Comfort™ switch gives you hands-free control. Press once to select Low, Medium, or High — the pad stays at your chosen setting until the 25-minute auto shutoff.
- Generic drugstore pads max out at 120–140°F. The Liberty II Plus 355 reaches up to 165°F on High for deep, therapeutic moist heat that penetrates muscles and joints.
- At roughly 4 pounds, the pad molds to curves and joints, maintaining full surface contact for consistent heat delivery. Stays in place better than lightweight generic pads.
- Nearly twice the size of many drugstore pads. Covers the full back, wraps around a hip or thigh, or drapes across both shoulders simultaneously.
- Moist heat therapy is a proven drug-free method to relieve arthritis, back pain, muscle spasms, fibromyalgia, and sports injuries without pills or side effects.
- The Liberty II Plus 355 qualifies for HSA and FSA purchases. Also approved for Medicare reimbursement when prescribed for arthritis pain management.
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Perfect For
- People in dry climates, desert environments, or heavily air-conditioned spaces
- Clinical environments — physical therapy, chiropractic, and massage offices
- Buyers who want USA assembly + Moisture-Plus cover + hands-free switch
- Back pain, arthritis, sciatica, fibromyalgia, muscle spasms
- Anyone tired of replacing cheap drugstore pads every 1–2 years
You May Prefer a Different Model If…
- You don't need the Moisture-Plus cover → Liberty 155 — same USA assembly, standard cover, lower price
- You want the Moisture-Plus cover at a lower price → MaxHEAT Plus 355 — same cover, assembled in China
- You want digital temperature control up to 170°F → Digital 655
- You want press-and-hold control with USA assembly → Liberty 055
Liberty II Plus 355 — Specifications
| Specification | Detail |
|---|---|
| Model | Liberty II Plus 355 |
| Line | Liberty (USA Assembled) |
| Size | 14" × 27" (Large) |
| Best for | Back, shoulders, hips, and legs |
| Weight | ~4 lbs |
| Max temperature | Up to 165°F |
| Heat settings | 3 (Low / Medium / High) |
| Switch type | Constant-Comfort™ hands-free switch |
| Auto shutoff | 25 minutes |
| Moist heat | Automatic + Moisture-Plus 3-layer cover with washcloth |
| Cover | Moisture-Plus 3-layer fleece — removable, machine washable |
| Cord length | 10 feet |
| Assembled in | USA — Fremont, Indiana |
| HSA / FSA eligible | Yes |
| Medicare approved | Yes — when prescribed for arthritis |
| Warranty | 2 years |
| Brand | Battle Creek Equipment Company (est. 1931) |
Complete Thermophore Comparison
Every Thermophore moist heating pad, side by side. Find the right model for your needs.
| Feature | Lib. II Plus 355 ★ | Liberty 155 | MaxHEAT 155 | Classic 055 | Digital 655 | MaxHEAT 156 |
|---|---|---|---|---|---|---|
| Size | 14" × 27" | 14" × 27" | 14" × 27" | 14" × 27" | 14" × 27" | 14" × 14" |
| Max temp | Up to 165°F | Up to 165°F | Up to 165°F | Up to 165°F | Up to 170°F | 150–165°F |
| Cover | Moisture-Plus 3-layer + washcloth | Standard fleece | Standard fleece | Standard fleece | Standard fleece | Standard fleece |
| Switch | Constant-Comfort™ (3-setting) | 3-setting (Low/Med/High) | 3-setting (Low/Med/High) | Press & hold | Digital 115–170°F | 3-setting (Low/Med/High) |
| Auto Shutoff | 25 min | 25 min | 25 min | 25 min + auto-cool | Up to 60 min | 25 min |
| Assembled In | USA | USA | China | China | China | China |
| Price | $94.99 | $75.99 | $69.99 | $67.99 | $99.99 | $61.95 |
| Shop | ★ This Product | Liberty 155 | MaxHEAT 155 | Classic 055 | Digital 655 | MaxHEAT 156 |
All Thermophore pads produce automatic moist heat without adding water. All include a washable fleece cover, 10-foot cord, and 2-year warranty. All are HSA / FSA eligible. Prices may vary.
Frequently Asked Questions
What is the Moisture-Plus cover and how is it different?
The Liberty II Plus 355 comes with a Moisture-Plus 3-layer cover and a washcloth. Like all Thermophore covers, the fleece absorbs humidity from the air to produce automatic moist heat. But in very dry or heavily air-conditioned environments, the Moisture-Plus cover allows you to insert a damp washcloth inside for additional moisture. This makes the 355 the most versatile Thermophore for any climate.
What is the difference between the Liberty II Plus 355 and the Liberty 155?
Both are 14" × 27", ~4 lbs, assembled in the USA, with 3 heat settings and 25-minute auto shutoff up to 165°F. The key difference is the cover. The Liberty II Plus 355 has the Moisture-Plus 3-layer cover with a washcloth for dry climates. The Liberty 155 has the standard fleece cover that relies on ambient humidity. Both use the Constant-Comfort™ hands-free switch.
What is the Constant-Comfort™ switch?
The Constant-Comfort™ switch is Thermophore's patented hands-free 3-setting controller. Press once to select Low, Medium, or High — the pad stays on until the 25-minute auto shutoff. Unlike the press-and-hold switch on Classic models, you do not need to hold the button. The pad heats hands-free while you relax.
How does the Thermophore produce moist heat without adding water?
The fleece cover absorbs moisture from the humidity in the surrounding air. The pad's intense heat activates that moisture into therapeutic steam that penetrates deeper into muscles and joints than dry heat alone. No water, spray bottles, or damp towels are needed. The cover produces moist heat for 20–30 minutes. In very dry environments, the Moisture-Plus cover lets you add a damp washcloth for supplemental moisture.
Why does the pad shut off after 25 minutes?
The 25-minute auto shutoff is a safety feature. Thermophore pads reach higher temperatures than generic brands, so limiting exposure follows clinically recommended therapy intervals of 15–30 minutes and prevents burns if you fall asleep with the pad on.
Is it HSA or FSA eligible?
Yes. The Thermophore Liberty II Plus Model 355 is HSA and FSA eligible. Also approved for Medicare and insurance reimbursement when prescribed for arthritis pain management.
Can I lay on this heating pad?
No. Place it on top of the body area only. Laying on a heating pad can trap heat against the skin and increase the risk of burns. The weighted design ensures the pad stays in place without the need to lay on it.
Questions? Sales: 1-800-403-8285 · Warranty: 1-800-253-0854
Thermophore.com is managed by HRM USA Inc, 49 Richard Rd, Warminster, PA 18974.
Owned by Battle Creek Equipment Company, established 1931.
Thermophore Liberty II Plus — Large 14" × 27"
USA Assembled · Model 355
The premium Thermophore. USA assembly + Moisture-Plus 3-layer cover in one pad. Hands-free Constant-Comfort™ switch, weighted ~4 lbs, up to 165°F, 25-minute auto shutoff. Works in any climate — dry, humid, or heavily air-conditioned.
- Assembled in the USA
- Moisture-Plus Cover
- Constant-Comfort™ Switch
- Up to 165°F
- ~4 lbs Weighted
- HSA / FSA Eligible
- 2-Year Warranty
I've broken so many sub-par heating pads over the years. They never get as hot as I need them to and their cords are flimsy. I finally decided to splurge on this one and I'm so glad I did! It's the heating pad of my dreams.
Product Overview — Premium Moist Heat, Assembled in the USA
Our Take: The Liberty II Plus 355 is the premium Thermophore for people who want everything: USA assembly, hands-free 3-setting operation, and the Moisture-Plus cover that works in any climate. It shares the same 14" × 27" size, ~4 lb weighted body, 3 heat settings, 165°F max, and 25-minute auto shutoff as the Liberty 155. The difference is the cover. Standard Thermophore covers rely on ambient humidity and work perfectly in most homes. If you live in a very dry climate, run heavy air conditioning, or use the pad in a clinical environment, the Moisture-Plus 3-layer cover lets you insert a damp washcloth for supplemental moisture. The Constant-Comfort™ switch is hands-free — press once, select your setting, and relax. If you don't need the Moisture-Plus cover, the Liberty 155 delivers the same USA assembly at a lower price. For the same Moisture-Plus cover without USA assembly, the MaxHEAT Plus 355 is the value option.
- The 3-layer Moisture-Plus cover produces automatic moist heat from ambient humidity. In dry climates or heavy A/C, insert a damp washcloth inside for supplemental moisture. The most versatile Thermophore cover.
- The Liberty line has been assembled at the Thermophore facility in Fremont, Indiana since 1987. The 355 is the premium Moisture-Plus model in the Liberty line.
- Thermophore's patented hands-free switch. Press once to select Low, Medium, or High — the pad stays at your chosen setting until the 25-minute auto shutoff. No button-holding required.
- Generic drugstore pads max out at 120–140°F. The Liberty II Plus 355 reaches up to 165°F on High for deep, therapeutic moist heat that penetrates muscles and joints.
- At roughly 4 pounds, the pad molds to curves and joints, maintaining full surface contact for consistent heat delivery. Stays in place and contours to your body better than lightweight pads.
- Nearly twice the size of many drugstore pads. Covers the full back, wraps around a hip or thigh, or drapes across both shoulders simultaneously.
- Moist heat therapy is a proven drug-free method to relieve arthritis, back pain, muscle spasms, fibromyalgia, and sports injuries without pills or side effects.
- The Liberty II Plus 355 qualifies for HSA and FSA purchases. Also approved for Medicare and insurance reimbursement when prescribed for arthritis pain management.
Tip: select a reason to read more details. Press Escape to close.
- People in dry climates, desert environments, or heavily air-conditioned spaces
- Clinical environments — physical therapy, chiropractic, and massage offices
- Buyers who want USA assembly + Moisture-Plus cover + hands-free switch
- Back pain, arthritis, sciatica, fibromyalgia, muscle spasms
- Anyone tired of replacing cheap drugstore pads every 1–2 years
- You don't need the Moisture-Plus cover → Liberty 155 — same USA assembly, standard cover, lower price
- You want the Moisture-Plus cover at a lower price → MaxHEAT Plus 355 — same cover, assembled in China
- You want digital temperature control up to 170°F → Digital 655
- You want press-and-hold control with USA assembly → Liberty 055
Where the Liberty II Plus Works
How Deep Moist Heat Works — Place It. Set It. Feel It.
Why Thermophore Outperforms Generic Pads
Assembled in the USA — Fremont, Indiana Since 1987
Liberty II Plus 355 — Full Specifications
| Specification | Detail |
|---|---|
| Model | Liberty II Plus 355 |
| Line | Liberty (USA Assembled) |
| Size | 14" × 27" (Large) |
| Best for | Back, shoulders, hips, and legs |
| Weight | ~4 lbs |
| Max temperature | Up to 165°F |
| Heat settings | 3 (Low / Medium / High) |
| Switch type | Constant-Comfort™ hands-free switch |
| Auto shutoff | 25 minutes |
| Moist heat | Automatic + Moisture-Plus 3-layer cover with washcloth |
| Cover | Moisture-Plus 3-layer fleece — removable, machine washable |
| Cord length | 10 feet |
| Assembled in | USA — Fremont, Indiana |
| HSA / FSA eligible | Yes |
| Medicare approved | Yes — when prescribed for arthritis |
| Warranty | 2 years |
| Brand | Battle Creek Equipment Company (est. 1931) |
Complete Thermophore Comparison
Every Thermophore moist heating pad, side by side. Find the right model for your needs.
| Feature | Lib. II Plus 355 ★ | Liberty 155 | MaxHEAT 155 | Classic 055 | Digital 655 | MaxHEAT 156 |
|---|---|---|---|---|---|---|
| Size | 14" × 27" | 14" × 27" | 14" × 27" | 14" × 27" | 14" × 27" | 14" × 14" |
| Max temp | Up to 165°F | Up to 165°F | Up to 165°F | Up to 165°F | Up to 170°F | 150–165°F |
| Cover | Moisture-Plus 3-layer + washcloth | Standard fleece | Standard fleece | Standard fleece | Standard fleece | Standard fleece |
| Switch | Constant-Comfort™ (3-setting) | 3-setting (Low/Med/High) | 3-setting (Low/Med/High) | Press & hold | Digital 115–170°F | 3-setting (Low/Med/High) |
| Auto shutoff | 25 minutes | 25 minutes | 25 minutes | 25 min + auto-cool | Up to 60 min | 25 minutes |
| Assembled in | USA | USA | China | China | China | China |
| Price | $89.99 | $74.99 | $63.97 | $60.43 | $124.99 | $53.84 |
| Shop | ★ This Product | Liberty 155 | MaxHEAT 155 | Classic 055 | Digital 655 | MaxHEAT 156 |
All Thermophore pads produce automatic moist heat without adding water. All include a washable cover, 10-foot cord, and 2-year warranty. All are HSA/FSA eligible. Prices may vary.
Frequently Asked Questions
What is the Moisture-Plus cover and how is it different?
The Liberty II Plus 355 comes with a Moisture-Plus 3-layer cover and a washcloth. Like all Thermophore covers, the fleece absorbs humidity from the air to produce automatic moist heat. But in very dry or heavily air-conditioned environments, the Moisture-Plus cover allows you to insert a damp washcloth inside for additional moisture. This makes the 355 the most versatile Thermophore for any climate.
What is the difference between the Liberty II Plus 355 and the Liberty 155?
Both are 14" × 27", ~4 lbs, assembled in the USA, with 3 heat settings and 25-minute auto shutoff up to 165°F. The key difference is the cover. The Liberty II Plus 355 has the Moisture-Plus 3-layer cover with a washcloth for dry climates. The Liberty 155 has the standard fleece cover that relies on ambient humidity. Both use the Constant-Comfort™ hands-free switch.
What is the Constant-Comfort™ switch?
The Constant-Comfort™ switch is Thermophore's patented hands-free 3-setting controller. Press once to select Low, Medium, or High — the pad stays on until the 25-minute auto shutoff. Unlike the press-and-hold switch on Classic models, you do not need to hold the button. The pad heats hands-free while you relax.
How does the Thermophore produce moist heat without adding water?
The fleece cover absorbs moisture from the humidity in the surrounding air. The pad's intense heat activates that moisture into therapeutic steam that penetrates deeper into muscles and joints than dry heat alone. No water, spray bottles, or damp towels are needed. The cover produces moist heat for 20–30 minutes. In very dry environments, the Moisture-Plus cover lets you add a damp washcloth for supplemental moisture.
Why does the pad shut off after 25 minutes?
The 25-minute auto shutoff is a safety feature. Thermophore pads reach higher temperatures than generic brands, so limiting exposure follows clinically recommended therapy intervals of 15–30 minutes and prevents burns if you fall asleep with the pad on.
Is the Liberty II Plus 355 HSA or FSA eligible?
Yes. HSA and FSA eligible. Also approved for Medicare and insurance reimbursement when prescribed for arthritis pain management. Check with your insurance company to verify reimbursement.
Can I lay on this heating pad?
No. Place it on top of the body area only. Laying on a heating pad can trap heat against the skin and increase the risk of burns. The weighted design ensures the pad stays in place and maintains full body contact without the need to lay on it.