What Are the Latest Wearable Cooling Technologies for Marathon Runners in Hot Climates?

April 16, 2024

As you navigate your training or marathon runs in hot weather, combating the heat has probably become a top priority. Overheating can hinder performance, leaving even the most seasoned athletes feeling drained and defeated. But here’s the good news: you don’t have to bear the brunt of the heat anymore. The latest wearable cooling technologies have hit the market, promising to keep your body at an optimal temperature even in the most sweltering conditions.

The Science Behind Body Heat and Performance

Before we delve into the latest tech on the market, let’s understand why regulating body temperature is vital for athletes, particularly runners.

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When you engage in sports activities such as running, your body generates heat. This heat increases your body temperature, which is initially beneficial as it aids muscle efficiency. However, once your core body temperature reaches around 40°C (104°F), performance starts to decline. Your body, in an attempt to cool down, diverts blood from your muscles to your skin, impairs your cardiovascular system, and could potentially lead to heatstroke.

This link between heat and performance is why many athletes have traditionally used methods such as ice vests or evaporative cooling techniques before they compete. While these methods can be effective, they are often cumbersome and only provide temporary relief.

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Enter Wearable Cooling Technologies

In recent times, wearable cooling devices have become the answer to sustained temperature regulation. These portable and lightweight devices harness the power of thermoelectric cooling, harnessing air and fan technology, and even more sophisticated methods to keep your body at the ideal temperature.

One such device is the G2T Moai N1 Plus Electric Scarf, available on Amazon. This scarf, draped around your neck, cools down the blood flowing to your brain, effectively reducing your overall body temperature. The scarf’s dual temperature modes allow athletes to adjust the level of cooling based on their comfort or the outside temperature.

Cooling Devices Optimized for Running

While there are numerous cooling gadgets on the market, not all of them are suitable for use during a marathon, especially in scorching climates. Ideally, a wearable cooling device for running should be lightweight, comfortable, durable, and long-lasting. Additionally, the device should maintain a steady cooling effect over time, rather than just providing temporary relief.

The Embr Wave Bracelet, for instance, is a wrist-worn device that cools or warms the inside of your wrist in waves. This sensation prompts your body to feel cooler or warmer overall in just a few minutes. Most importantly, the bracelet has an extended battery life, ensuring that you can make it through your marathon without the device dying on you.

Wearable air conditioners are also gaining popularity. The Sony Reon Pocket, a small device that fits into a pocket on a special undershirt, uses thermoelectric cooling to create a personal microclimate for the wearer.

The Future of Wearable Cooling Technology

The wearable cooling technology industry is continually evolving, with more cutting-edge devices in the pipeline. The data from the devices, including details regarding body heat and environmental temperature, may also provide valuable insights for improving athletic performance.

One example of future-facing technology is the Hexoskin Smart Shirt. This shirt not only cools the wearer but also collects data on heart rate, step count, sleep duration, and other vital statistics. These comprehensive datasets will enable athletes to better understand their bodies and optimize their performance over time.

Making the Best Choice for You

The right wearable cooling technology for you will depend on several factors, including your personal comfort, the climate in which you’ll be running, and your budget.

When choosing a device, consider how it feels on your body. A device that is uncomfortable or chafes could distract you from your run. Next, evaluate whether the device is suited for the climate you’ll be running in. If you’re running in a dry, hot climate, a device that uses evaporative cooling might be less effective. Lastly, consider the cost. Some devices are more expensive than others, so you’ll want to find a balance between cost and effectiveness.

Remember, while these devices can enhance your performance by keeping you cool, they are not a substitute for proper heat training and hydration. It’s essential to prepare your body for hot weather running and to hydrate properly before, during, and after your run.

Advancements in Neck Fans and Portable Air Conditioners

Portable neck fans are another wearable cooling technology that has gained traction among athletes and marathon runners. Available on platforms like Amazon, these innovative devices use air and fan technology to provide a continuous flow of cool air around the neck, reducing body temperature and providing relief from heat stress.

One popular model is the OPOLAR Necklace Fan, which boasts an adjustable fan speed mechanism, allowing users to control the intensity of the airflow. The device also has a long battery life, ensuring that the fan can last throughout a marathon. Additionally, its lightweight design reduces the risk of neck strain, making it comfortable to wear during long runs.

Portable air conditioners, such as the Zero Breeze Mark 2, have also made a mark in the running community. These devices, although slightly heavier than neck fans, provide more powerful cooling effects. The Zero Breeze Mark 2, in fact, can cool an enclosed space up to 30°F in just ten minutes. Although not as portable as other options, these air conditioners can be beneficial for runners who are training or resting in hot, enclosed spaces.

The Role of Environmental Conditions and Heat Illness Prevention

Understanding the environmental conditions in which you’ll be running is crucial when selecting a wearable cooling device. Devices utilizing evaporative cooling, for instance, may not be effective in high humidity conditions. In contrast, thermoelectric cooling devices like the Sony Reon Pocket can operate effectively regardless of the humidity level.

Beyond comfort and performance enhancement, wearable cooling technologies can play a pivotal role in preventing heat illnesses. Conditions such as exertional heat stroke, which is a life-threatening emergency, can be avoided by maintaining a suitable core body temperature during the run.

The Hexoskin Smart Shirt and other similar devices can monitor your heart rate and body temperature in real-time, alerting you to any potential dangers. This real-time data can be instrumental in preventing heat-related illnesses and ensuring a safe run.


There’s no doubt that the latest wearable cooling technologies have revolutionized how marathon runners manage heat stress. By optimizing body temperature, these devices enable athletes to maintain peak performance even in hot climates.

Furthermore, the integration of technology with monitoring systems such as heart rate and body temperature sensors adds an additional layer of safety, helping athletes avoid heat-related illnesses. They are also valuable tools for collecting data on individual performances, which can be used to devise more effective training strategies.

While the best wearable device for you largely depends on your specific needs and environmental conditions, it’s clear that options like neck fans, portable air conditioners, and thermoelectric cooling devices are reshaping the running landscape. With continuous advancements, the future of wearable cooling technology promises even more efficient and innovative solutions for athletes worldwide.

However, it’s essential to remember that while these gadgets can help manage body heat, runners should not solely rely on them. Proper training, acclimatization, and hydration remain the cornerstones of safe and effective long-distance running in hot climates.