Fieldsheer Apparel Technologies Recalls Heated Socks Due to Injury Hazard

What was recalled

The U.S. Consumer Product Safety Commission (CPSC) has announced a significant recall involving heated socks manufactured by Fieldsheer Apparel Technologies. This voluntary safety action, dated August 7, 2025, targets specific models of these apparel items due to the potential for serious injury. The affected products are the Fieldsheer heated socks, specifically identified by the model numbers MWMS07, MWWS07, and MWMS05. These are not standard winter socks; they are technologically integrated garments designed to provide warmth through internal heating elements powered by external battery packs.

The recalled items come in several distinct color combinations, including black/gray, gray/orange, gray/pink, and black/orange. They were available in a range of sizes, from small through extra-large, making them accessible to a wide demographic of consumers. Each pair of socks was sold with two lithium-ion battery packs and a charging cable, which are essential components for the product’s operation. The design features a dedicated battery pocket on each sock, which is secured by either a slit opening or a zipper that is either black or gray. On the front of each sock, the Fieldsheer logo is prominently displayed in orange, serving as a clear brand identifier.

There are subtle but important differences between the models included in this recall. The MWMS05 model comes with a battery pack identified by the model number MW37V122 and includes a four-button remote control that allows users to adjust heat settings directly. In contrast, the MWMS07 and MWWS07 models utilize Bluetooth-enabled battery packs, which carry the model number MW37V22-N. For consumers trying to identify their specific product, the model number is printed on the top left corner of the label located on the back of the battery pack itself.

The recall covers units that were sold in the United States and its territories. While the provided facts do not specify the exact retail stores or online platforms where these socks were purchased, nor the specific dates of sale prior to this announcement, it is critical for any owner of these models to verify their product against the details above. If you possess Fieldsheer heated socks matching these model numbers and descriptions, they are part of this recall. The inclusion of both wired remote-controlled models and Bluetooth-enabled models in this single recall highlights that the hazard is linked to the fundamental operation of the heating elements under specific conditions, rather than a flaw in just one type of connectivity technology.

The hazard, explained

At first glance, heated socks seem like a simple comfort upgrade for cold weather. However, the specific danger identified in this recall stems from a complex interaction between the sock’s heating elements and the physical environment of your foot during intense movement. The U.S. Consumer Product Safety Commission (CPSC) reports that these Fieldsheer Apparel Technologies socks can cause pain, discomfort, burns, and blisters when worn during high-intensity activities. This is not merely a matter of the socks getting "too hot" in a static sense; it is about how heat accumulates under specific physical conditions.

The core issue lies in the combination of four factors: heat generation, excessive friction, moisture, and pressure. When you engage in high-intensity activities—such as running, hiking steep terrain, or intense workout routines—your feet sweat significantly, creating a moist environment inside the sock. Simultaneously, your movements cause the sock to rub against your skin (friction) and press tightly against your foot (pressure). Under normal circumstances, socks are designed to wick away moisture and allow heat to dissipate. However, in this recalled scenario, the lithium-ion battery packs generate heat that becomes trapped by the combination of sweat, tight fabric fit, and continuous rubbing.

This trapped heat does not distribute evenly. Instead, it concentrates in specific areas where friction is highest or where the battery pack sits directly against the skin. The CPSC notes that this localized overheating can lead to thermal burns. Because the heat source is internal and close to the body, you might not immediately feel the danger until tissue damage has already begun. This explains why the reported incidents include both pain and physical injuries like blisters and burns. The injury mechanism is essentially a low-temperature burn caused by prolonged exposure to concentrated heat in a moist, high-pressure environment, which compromises the skin’s integrity more quickly than dry heat would.

It is important to distinguish this from general warmth. Everyday heated clothing is typically designed with safety thermostats and materials that prevent such dangerous accumulation of heat during normal use. The hazard here emerges specifically when the product is subjected to the rigorous conditions of high-intensity activity, where the body’s natural responses (sweating and increased blood flow) interact negatively with the device’s heat output. This creates a perfect storm for injury, turning a comfort item into a source of physical harm. If you have experienced unusual warmth or discomfort while wearing these socks during vigorous exercise, it is likely due to this specific interaction of factors.

Who is most at risk

The primary group at risk for injury from these recalled Fieldsheer heated socks includes individuals who engage in high-intensity physical activities while wearing them. The recall notice specifically highlights that the hazard arises from a combination of factors: heat, excessive friction, moisture, and pressure. This means that casual wearers who simply put the socks on to walk around the house are at a significantly lower risk than athletes or active users. However, anyone using these socks for activities such as running, hiking, skiing, or intense winter workouts is potentially vulnerable because their bodies generate more heat and sweat, which interacts with the sock’s heating elements in unpredictable ways.

While the recall does not explicitly single out a specific age group as being uniquely vulnerable to the mechanism of injury itself, general safety principles suggest that certain populations may be less able to perceive or react to early warning signs of thermal injury. For instance, older adults often experience reduced circulation and thinner skin, which can make them more susceptible to burns even at lower temperatures. Additionally, individuals with conditions such as diabetes or peripheral neuropathy may have diminished sensation in their feet. If you cannot feel the exact moment a sock becomes too hot, you might continue wearing it until significant tissue damage occurs. This "silent" progression of injury is particularly dangerous because the pain that usually serves as a natural warning system is absent.

Children and teenagers who are active in winter sports may also be at risk if they use these adult-sized models, although the recall notes sizes from small to extra-large. Younger users might not be as attuned to the subtle sensations of overheating or excessive pressure points caused by the battery pocket. If a child feels discomfort but ignores it because they want to continue playing, the resulting blisters or burns could become severe before they realize the extent of the harm. Furthermore, individuals with sensitive skin or pre-existing foot conditions might find the combination of synthetic heating materials and wool lining more irritating than others, increasing their likelihood of developing painful blisters.

It is also important to consider people who may not fully understand how lithium-ion batteries behave when they malfunction. Anyone who has not read the safety instructions carefully might continue to use the socks even after noticing unusual warmth or irregular heating patterns. The risk is compounded for those who wear the socks for extended periods without checking the fit or the battery status. If you fall into any of these categories—whether due to age, health condition, activity level, or lack of awareness—you should treat this recall with utmost urgency. Do not assume that because you have not felt pain yet that the risk is nonexistent; the potential for burns and blisters is real and immediate when these specific conditions are met.

How to tell if you have the recalled item

Before taking any action, it is essential to confirm exactly which product you own. The recall issued by the Consumer Product Safety Commission (CPSC) targets specific heated socks manufactured by Fieldsheer Apparel Technologies. If you are unsure whether your socks fall under this notice, start by checking the branding and the physical construction of the item. You should look for the Fieldsheer logo printed in orange on the front of each sock. This visual cue is a primary indicator that you are dealing with the correct brand, but it is not sufficient on its own to confirm the recall status.

The most reliable way to identify the recalled units is by examining the model numbers and the specific components included with the socks. The recall covers three specific models: MWMS07, MWWS07, and MWMS05. These merino wool socks were sold in several color combinations, including black/gray, gray/orange, gray/pink, and black/orange. They are available in sizes ranging from small through extra-large. A key identifying feature is that these recalled pairs come with two lithium-ion battery packs and a charging cable. You must also inspect the battery pocket on the socks; it will have either a slit opening or a zipper that is either black or gray.

To definitively confirm if your product is part of this recall, you need to look closely at the battery packs themselves. The model number is printed on the top left corner of the label located on the back of the battery pack. Your specific situation depends on which model you purchased:

• If you have model MWMS05, your battery pack will carry the model number MW37V122 and will be accompanied by a four-button remote control used to adjust heat settings.
• If you have models MWMS07 or MWWS07, these units include Bluetooth-enabled battery packs with the model number MW37V22-N.

By cross-referencing these printed codes on the battery pack label with the list above, you can determine with certainty whether your heated socks are subject to this safety notice. If the numbers match, do not attempt to use them again until you have followed the remedy instructions provided by the manufacturer.

What to do — step by step

Your refund, repair, or replacement options

If you have identified that your heated socks belong to the Fieldsheer Apparel Technologies recall, the good news is that the company has established a straightforward and consumer-friendly remedy to resolve the issue. You are not required to keep a product that poses a safety risk, nor are you expected to absorb the cost of replacing it yourself. The official remedy provided by the manufacturer is quite generous: they are offering consumers the choice of either a full refund or a replacement product of equal value. This means you can get your money back entirely if you no longer wish to have heated socks, or you can swap out the recalled items for new ones that do not carry the same hazard, ensuring you still have warm feet without the risk.

To initiate this process, you will need to reach out directly to Fieldsheer Apparel Technologies. The company has set up specific channels for consumers to contact them regarding this recall. You can call their dedicated toll-free number at 888-908-6024. Please note that customer service is available from 8 a.m. to 4 p.m. Pacific Time, Monday through Friday. If you prefer written communication or need to provide details about your purchase, you may also send an email to cs@fieldsheer.com. For those who prefer to navigate the process online, Fieldsheer has created a dedicated page for this recall information at https://fieldsheer.com/pages/recall-information. You can also access this by visiting their main website at https://fieldsheer.com and clicking on the "Recall Information" link.

When you contact the company, be prepared to provide details about your specific model to help them process your claim efficiently. As noted in the recall description, the affected models are MWMS07, MWWS07, and MWMS05. Knowing which model you have will speed up the verification process. The model number can typically be found printed on the top left corner of the label on the back of the battery pack associated with your socks. Having this information ready will help customer service agents confirm that your item is indeed part of the recall and eligible for the remedy.

It is important to understand that while you are entitled to a refund or replacement, the responsibility for disposing of the hazardous component—the lithium-ion battery packs—falls on you, but it must be done safely. The recall notice explicitly states that consumers should dispose of the lithium-ion battery packs in accordance with applicable laws and regulations. Do not simply throw these batteries in your regular trash, curbside recycling bins, or standard used battery collection boxes found at retail stores. Lithium-ion batteries present a greater risk of fire if mishandled compared to other types of batteries. Instead, you should check with your local municipal household hazardous waste (HHW) collection center to see if they accept these specific items. It is advisable to call ahead to confirm their acceptance policies before transporting the batteries. This step ensures that while you are resolving your consumer issue with Fieldsheer, you are also protecting the environment and public safety from potential fire hazards.

Ultimately, the goal of this remedy is to remove the hazard from your home quickly and without financial burden. Whether you choose a refund to walk away from the product entirely or a replacement to continue using heated socks safely, the path forward is clear. By following the contact instructions provided and adhering to safe disposal practices for the batteries, you are taking the right steps to protect yourself and your household.

What can happen if you ignore it

It is tempting to dismiss a recall notice as an inconvenience, especially when the product in question offers comfort and warmth during cold weather. However, ignoring this specific warning from Fieldsheer Apparel Technologies carries significant physical risks that extend far beyond mere discomfort. The core issue with these recalled heated socks lies in how they interact with your body during active use. When you engage in high-intensity activities, your body generates substantial heat, while simultaneously producing moisture through sweat and creating friction against your skin. The recalled socks are designed to retain this combination of heat, excessive friction, moisture, and pressure. Under these specific conditions, the heating elements do not just provide warmth; they can cause rapid and severe tissue damage.

The danger is not abstract. According to official reports from the Consumer Product Safety Commission (CPSC), continuing to use these socks without stopping has already resulted in tangible harm. The company has documented eleven separate incidents where users experienced significant pain and discomfort. More alarmingly, four of those reported cases have escalated to actual physical injuries, specifically burns and blisters. This is not a hypothetical risk based on laboratory simulations alone; it is a pattern of real-world injury that has already occurred to other consumers. If you continue to wear these socks during exercise, sports, or any activity that causes your feet to sweat and rub against the material, you are actively increasing your likelihood of becoming the next statistic in that group.

Beyond the immediate physical pain of burns and blisters, there is a secondary risk associated with the device itself if you attempt to keep it for "later use." The recalled models come equipped with lithium-ion battery packs. These batteries are not standard disposable cells; they contain chemical energy that can become unstable if damaged or improperly handled. If you ignore the remedy instructions and simply throw these socks in your regular trash, you risk igniting a fire in your waste bin or at a recycling facility. Lithium-ion batteries require specialized disposal through household hazardous waste centers because they pose a distinct fire hazard that standard recycling streams cannot safely manage. Therefore, ignoring the recall does not just endanger your health; it also creates an environmental and safety hazard for waste management workers if the batteries are not disposed of correctly.

Ultimately, the consequence of inaction is a choice between temporary convenience and serious injury. The pain described in the reports—burns and blisters caused by the unique combination of heat and friction—is preventable. By continuing to use the product, you are disregarding clear evidence that it fails to maintain safe temperatures under active conditions. The remedy offered—a full refund or replacement—is designed to remove this specific danger from your life. Choosing not to act leaves you exposed to a known injury hazard that has already caused physical harm to others in similar situations.

Staying safe: broader tips

When we talk about personal heating devices like heated socks, gloves, or vests, the core principle of safety is understanding that electricity and thermal energy are powerful tools that require respect. While these products offer wonderful comfort during cold weather, they introduce specific risks that differ from traditional clothing. The most critical rule for anyone owning battery-powered wearable technology is to treat the power source with the same caution you would apply to any lithium-ion device, such as a smartphone or laptop. These batteries store a significant amount of energy in a compact space. If they are damaged, exposed to extreme temperatures beyond their design limits, or charged improperly, they can fail catastrophically. Always use only the charger provided by the manufacturer or one that matches the exact voltage and amperage specifications. Using generic or third-party chargers can bypass built-in safety circuits, leading to overheating or fire.

Beyond the power source, it is vital to understand how your body interacts with heat-generating garments. Human skin has a threshold for tolerance, especially when combined with other factors like moisture and pressure. When you engage in high-intensity activities, your body generates its own heat, and sweat increases conductivity and friction. This combination can cause even low-level electric heating elements to feel intensely hot, leading to burns that may not be immediately obvious because the outer skin layer might look normal while deeper tissue is damaged. To prevent this, never wear these garments during vigorous exercise or in environments where you cannot easily monitor your body temperature. If you feel any tingling, excessive warmth, or discomfort, remove the device immediately. Your skin’s feedback is an early warning system that should never be ignored.

Regular maintenance and inspection are also key components of staying safe with wearable technology. Before each use, visually inspect the garments for any signs of wear, such as frayed wires, punctured battery pockets, or exposed heating elements. If you notice any damage, stop using the product immediately. Even minor tears in the fabric can expose electrical components to moisture and sweat, creating a short-circuit risk. Additionally, follow the manufacturer’s washing instructions precisely. Many heated garments cannot be machine-washed or must be washed on a gentle cycle without fabric softeners, which can degrade the conductive threads over time. Proper care extends the life of the product and maintains its safety integrity.

Finally, stay informed about product recalls and safety advisories. Manufacturers occasionally discover defects after products have been sold, and recalling these items is a responsible step to protect consumers. You can sign up for alerts from the Consumer Product Safety Commission (CPSC) or check their website regularly to see if any of your household items are part of an active recall. Being proactive about product safety ensures that you and your family remain protected from hazards that might otherwise go unnoticed until it is too late.