Heated Insoles Lawsuit [2026 Update]

Defective Heated Insoles Linked to Severe Burn Injuries

Defective heated insoles are marketed as battery powered foot warmers for people who want extra warmth during work, hunting, hiking, and other cold weather activities, but recent safety actions show that some of these products may pose a serious fire hazard instead.

The central concern is that many models place an internal battery and heating system directly beneath users’ feet inside enclosed footwear, where heat can build quickly and become difficult to detect or escape.

The U.S. Consumer Product Safety Commission has issued multiple warnings involving heated insoles sold on Amazon, including iHeat, Tajarly, and Junsyoung products.

In those warnings, the Consumer Product Safety Commission (CPSC) urges consumers to stop using the products because the internal lithium-ion batteries can overheat, ignite, or even explode, sometimes while the insoles are turned off and sometimes while they are in use.

Those warnings also show that the problem is not limited to one isolated event or one brand. CPSC reported thermal incidents involving fires, explosions, and other battery failures tied to these insoles, along with burn injuries that in some cases included second- and third-degree burns, skin grafts, and extended hospital stays.

At the center of many of these reports are defective lithium ion batteries and related failures that can trigger dangerous heat buildup in a part of the body that is already under pressure inside a shoe or boot.

When that happens, users’ feet may be exposed to intense heat, burning material, or a delayed removal situation that allows serious burn injuries to worsen before the product can be taken off.

How Heated Insoles Work

Heated insoles are designed as electronic inserts that fit inside shoes or boots, using built-in components to generate and regulate warmth for the foot.

Most models rely on a rechargeable lithium-ion battery that supplies power to an internal circuit and heating element embedded within the insole material.

When activated, electricity flows from the battery through the heating element, which produces heat and transfers it upward toward the foot, typically focusing on areas like the toes and ball of the foot.

Users can usually control the level of warmth through integrated buttons, remote controls, or app-based systems, with common settings ranging from low to high heat depending on preference and conditions.

Many heated insoles are also designed with basic safety and performance features intended to regulate temperature and battery use, helping maintain consistent heat output and prevent excessive power draw during use.

Typical features of heated insoles include:

• Rechargeable lithium-ion batteries embedded in or connected to the insole
• Internal heating elements positioned under key areas of the foot
• Temperature settings controlled by buttons, remotes, or mobile apps
• Indicator lights or displays showing heat level and battery status
• Basic safety features such as temperature regulation or automatic shutoff systems
• Charging ports and included chargers for repeated use

Why Heated Insoles Can Become Dangerous Inside Shoes and Boots

Heated insoles are often used in exactly the settings where a failure can turn serious fast: hunting before dawn, standing in work boots on a jobsite, walking dogs in winter, hiking in insulated boots, or spending hours outdoors in snow and cold.

Publicly reported incidents and lawsuits describe consumers using the products during ordinary outdoor activity when an insole allegedly overheated, ignited, or burst into flames inside a boot, including while walking outside, working as a pipefitter, hiking in winter boots, and hunting in waders.

What makes these incidents especially dangerous is not just the battery itself, but the setting around it.

A heated insole sits inside enclosed footwear where heat is trapped, smoke and flames are harder to identify immediately, and the boot or wader may take precious time to remove.

A burn surgeon interviewed by Lehigh Valley News explained that shoe inserts create an environment that retains heat, and that separation from the heat source can be difficult to do quickly, which allows the burn to deepen.

That problem can become even worse during activities where a person is far from immediate medical care or cannot stop instantly.

Someone hunting in waders, working on a remote site, hiking on a trail, or standing in heavy winter gear may not be able to remove footwear quickly enough to stop the thermal injury before it worsens.

Lawsuits and public reports repeatedly describe scenarios where the burn severity allegedly increased because the insole failed while the person was already in enclosed outdoor gear and could not get the boot off fast enough.

Common dangers in these situations include:

• Heat building inside a boot or shoe before the user realizes what is happening
• Delayed removal because of laces, insulated boots, work footwear, or waders
• Burning material or melted battery components staying pressed against the foot
• Smoke, ignition, or thermal runaway occurring while the person is active outdoors
• Limited access to immediate first aid or emergency care in remote settings
• Worse burn depth because the foot remains trapped against the heat source

These cases show why heated insoles can be more dangerous than an ordinary battery malfunction.

The design places a powered heat source directly under the foot, then surrounds it with insulated footwear that can intensify exposure instead of letting heat dissipate.

When a failure happens under those conditions, the result may be a deep burn injury that unfolds in seconds but affects walking, work, and recovery for months.

Heated Insoles Named in Lawsuits and Safety Warnings

A growing group of heated insole products has now been identified either in federal safety warnings, product liability lawsuits, or both.

The clearest public warnings involve iHeat heated insoles, Tajarly heated insoles, and Junsyoung heated insoles, all of which CPSC said pose serious burn and fire risks tied to internal lithium-ion batteries.

CPSC’s warnings describe batteries that can overheat, ignite, or explode, including reports of second- and third-degree burns, skin grafts, and extended hospital stays.

The agency has also urged consumers to dispose of defective heated insoles through local hazardous waste procedures because damaged lithium-ion battery products present a heightened fire risk.

The litigation record extends beyond those three warning notices.

Publicly reported lawsuits have also named CooWalk, Meisinuo, and Metasono heated insoles, with plaintiffs alleging that the products overheated, ignited, or exploded while being worn inside boots or shoes during normal use.

In a lawsuit involving CooWalk heated insoles, the plaintiff alleges the product overheated, ignited, and burst into flames inside her boot, and further alleges that Amazon continued selling the product despite prior notice of similar burn incidents.

These product names matter because they show the issue is broader than a single defective model.

Recent lawsuits involving heated insoles repeatedly allege that lithium-ion batteries in these products overheated, ignited, or exploded while being worn, causing severe burns and fires.

They also raise recurring claims about inadequate warnings, inadequate testing, and Amazon’s role in marketing, selling, and distributing products from unresponsive overseas manufacturers.

Products publicly named in lawsuits or safety warnings include:

• iHeat heated insoles: CPSC warned in July 2025 that the internal lithium-ion battery could explode and ignite, even when the insoles were turned off. CPSC reported 11 fires, explosions, and other thermal incidents, including eight burn injuries, and identified the manufacturer as Zhangfengqing, d/b/a iHeat, of China.
• Tajarly heated insoles: CPSC warned in September 2025 that the internal lithium-ion battery could overheat and ignite even when the insoles were turned off. CPSC reported four ignition, fire, and thermal incidents, including burn injuries and two incidents that required extended hospital stays, and identified the manufacturer as Shenzhen Tejiali Technology Co., of China.
• Junsyoung heated insoles: CPSC warned in March 2026 that the internal lithium-ion battery could overheat and ignite while in use. The agency reported four ignition, fire, and thermal incidents resulting in burn injuries, including second- and third-degree burns requiring skin grafts, and said the manufacturer in China had been unresponsive to recall requests.
• CooWalk heated insoles: A Colorado complaint alleges that a pair of CooWalk heated insoles bought from Amazon overheated, ignited, and burst into flames during normal use inside a winter hiking boot. The same complaint alleges Amazon had prior notice of similar incidents involving CooWalk heated insoles and failed to timely warn consumers or remove the product.
• Meisinuo heated insoles: A Kansas plaintiff sued Amazon and Meisinuo after heated insoles allegedly exploded and caught fire inside work boots while being used as intended.
• Metasono heated insoles: A January 2026 Tennessee lawsuit naming Amazon, Metasono, and Metasono US was filed after rechargeable heated insoles allegedly exploded while being worn, causing the batteries to melt, ignite, and adhere to the plaintiff’s skin.

These warnings and lawsuits show a consistent pattern of the same basic product category appearing in both injury reports and litigation.

They also show why current heated insole litigation often focuses not only on the foreign manufacturer, but also on Amazon and other retailers that marketed, sold, fulfilled, or continued distributing the products in the United States.

The CooWalk complaint, for example, specifically alleges Amazon failed to adequately test, warn, and remove a product despite notice of prior incidents, while broader heated insole reporting describes similar claims against Amazon based on its marketplace and fulfillment role.

The repeated appearance of Amazon-linked sales, foreign manufacturers, and claims of inadequate warnings has also made liability a central issue in this litigation.

Burn Injuries Reported With Heated Insoles

Burn injuries from heated insoles can become medically serious very quickly because the heat source is placed directly under the foot inside enclosed footwear.

A 2025 case series in the Journal of Burn Care & Research described three patients with full thickness burns caused by exploding heated insole devices over a single winter period, and all three required excision or skin grafting.

The authors noted that these burns may involve both thermal and chemical damage, which can make the wound more destructive than an ordinary surface burn.

The same report explains that heated insoles can reach roughly 110 to 140 degrees Fahrenheit for hours, and when batteries fail, thermal runaway can trigger rupture or combustion.

Even when the total burn area is relatively small, foot burns can still cause severe injuries because they affect a weight-bearing part of the body that is harder to protect during healing.

Reported injuries associated with heated insole burns include:

• Full-thickness burns to the foot, heel, ankle, or surrounding tissue
• Deep partial-thickness burns with blistering, open wounds, and significant pain
• Tissue damage requiring excision, debridement, or skin graft surgery
• Chemical injury from exposure to battery contents in addition to heat damage
• Infection risk during recovery, especially when sensation is reduced or wound care is delayed
• Nerve pain, numbness, hypersensitivity, and other injuries that continue after the burn has closed
• Gait problems and mobility limitations caused by pain, scarring, stiffness, or difficulty bearing weight on the foot

These injuries are especially disruptive because the foot has to tolerate pressure, movement, and daily use while healing.

Deeper burns can lead to infection, scarring, contractures, and the need for intensive rehabilitation, including range-of-motion work and splinting in some cases.

Reduced sensation in the feet can make burns and skin injuries harder to detect early, which matters in this setting because some users may not realize the severity of the heat until the damage has already progressed.

The medical concern, then, is not limited to the initial burn event itself but extends to nerve symptoms, delayed wound healing, functional loss, and a longer recovery period.

That is why heated insole burns can produce lasting foot problems even after the skin has technically healed.

Do You Qualify for a Heated Insoles Lawsuit?

You may qualify for a heated insoles lawsuit if you were injured while using the product during normal or intended use.

Recent lawsuits allege that lithium-ion batteries in heated insoles can overheat, ignite, or explode while being worn, leading to severe burns and fire-related injuries.

Injured consumers who required medical care, ongoing treatment, or recovery time may have grounds to pursue a claim.

These cases often involve allegations that manufacturers or sellers failed to meet basic safety standards in the design, testing, or warning of these products.

Claims may also extend beyond the manufacturer to distributors and online marketplaces like Amazon, especially where the product was marketed, fulfilled, or sold through those platforms.

Some lawsuits specifically allege that Amazon continued selling heated socks and insoles despite reports of serious injuries and failed to conduct adequate safety testing.

If your injury resulted in medical costs, lost income, or lasting physical effects, those damages may be considered as part of a claim.

Individuals harmed by defective heated insole products may have legal rights to seek compensation for both financial losses and the physical impact of the injury.

Gathering Evidence for a Heated Insole Burn Injury Claim

Evidence is a critical part of any heated insole burn injury claim because it helps show how the product failed and the extent of the harm it caused.

Medical records documenting emergency treatment, follow-up care, and recovery can establish both the severity of the injury and the need for ongoing care.

In many cases, treatment may include emergency room visits, skin graft surgeries, and therapy, all of which should be carefully documented.

Preserving the product and related materials can also help demonstrate how the incident occurred and whether the insole malfunctioned during normal use.

Evidence in these cases may include:

• The heated insoles involved in the incident
• Battery packs, chargers, and any related components
• Shoes or boots worn at the time of the injury
• Photographs of the burn injury and the product
• Emergency room records and burn treatment documentation
• Surgical records, including skin graft procedures
• Physical therapy or rehabilitation records
• Receipts, order confirmations, and purchase history
• Product packaging, instructions, and warning labels
• Communications with the seller, retailer, or manufacturer

Damages in Cases Involving Heated Insole Burn Injuries

Damages refer to the financial and personal losses an injured person may seek to recover after being harmed by a defective product.

In heated insole cases, burn injury lawyers evaluate the full impact of the injury by reviewing medical records, treatment history, and how the injury affects daily life and work.

That process often begins with calculating medical bills and the cost of all required medical treatment, including emergency care, surgery, and rehabilitation.

Lawyers also assess long-term effects such as pain, reduced mobility, and permanent damage to determine the total value of the claim.

The goal is to present a clear picture of both the immediate and ongoing losses so injured individuals can pursue fair compensation.

Damages in these cases may include:

• Medical bills for emergency care, hospitalization, and follow-up treatment
• Costs of required medical treatment, including surgery, wound care, and rehabilitation
• Future medical expenses related to ongoing care or complications
• Lost income during recovery and reduced earning capacity
• Physical pain and ongoing discomfort from the burn injury
• Emotional distress and mental suffering
• Scarring, disfigurement, and permanent skin damage
• Mobility limitations and reduced quality of life
• Physical therapy and rehabilitation costs
• Out-of-pocket expenses related to treatment and recovery

TorHoerman Law: Investigating Potentially Defective Heated Insoles

Reports of severe burn injuries tied to heated insoles have raised serious concerns about product safety, design, and the responsibility of companies that manufacture and sell these products.

When a product fails during normal use and causes harm, it may point to a defect that should have been identified before reaching consumers.

These cases often require a careful review of the product, medical records, and the chain of distribution to determine what went wrong and who may be responsible.

TorHoerman Law is investigating claims involving potentially defective heated insoles that allegedly caused serious burn injuries.

If you or a loved one were injured while using heated insoles, you can contact TorHoerman Law to discuss your situation and have your case reviewed.

A consultation can help determine whether your injury may be linked to a product defect or known safety issue.

You can speak with a legal team experienced in product liability cases to better understand your options and next steps.