For many runners, winter used to be an off-season. Today, that assumption no longer holds. Even in the middle of winter, more people are heading outdoors to run—and the sales data from major online fashion platforms clearly shows it.
From running shoes to fleece-lined tops and neck warmers, winter running gear is selling out, driven by a growing group of consumers who refuse to let low temperatures stop their training.
The Winter Running Boom: Cold Can’t Stop Runners Anymore
In recent months, outdoor running in sub-zero temperatures has moved from niche to mainstream. Rather than switching to indoor gyms or stopping entirely, many runners are simply upgrading their gear.
Online fashion platforms in Korea, a highly trend-sensitive market, are seeing strong demand for cold-weather running items, indicating that winter running is becoming part of an all-year fitness lifestyle rather than a seasonal exception.
Running Shoes Up 215%: Data from Korea’s Leading Fashion Platforms
Musinsa: Explosive Growth in Running Shoes and Accessories
On the fashion platform Musinsa, demand for running gear has surged:
- Running shoes: transaction amount up 215% year-on-year last month
- Running shoe searches: up 140% in the same period
Interest is not limited to footwear. Search volumes for related gear also jumped significantly:
- Running gloves: +336%
- Running vests: +383%
- Running socks: +319%
- Running belts: +137%
These figures suggest that consumers are not only buying shoes, but also assembling complete winter running outfits.
Zigzag: Thermal Tops, Beanies, and Lightweight Vests on the Rise
On another popular platform, Zigzag, the upward trend continues. Between the 1st and 17th of this month:
- Fleece long-sleeve tops saw transaction amounts climb 102% year-on-year.
During the same period, sales also increased for:
- Beanies: +60%
- Fleece knee-high socks: +16%
- Earmuffs: +16%
- Lightweight vests: +10%
Taken together, this data shows that winter running fashion is expanding beyond performance shoes into full-body cold-weather solutions.
The Cold-Weather Running Items Everyone Is Buying
Core Footwear: Modern Running Shoes for Winter Pavements
Running shoes remain the foundation of any running kit. The sharp 215% year-on-year increase in running shoe transactions highlights just how many consumers are either starting winter running or upgrading their footwear for better grip and comfort in cold conditions.
Must-Have Accessories: Gloves, Vests, Socks, Belts, and Beanies
Runners are also investing heavily in functional accessories:
- Running gloves help maintain dexterity and comfort in freezing air.
- Running vests and lightweight padded gilets add warmth to the core without restricting arm movement.
- Running socks offer extra cushioning and thermal protection.
- Running belts provide a way to carry phones, keys, or gels without bulky pockets.
- Beanies and earmuffs protect exposed areas of the head and ears from bitter wind chill.
These items turn a basic outfit into a winter-ready running system.
Fleece Long Sleeves, Knee-High Socks, and Neck Warmers for Extra Warmth
Cold-weather runners are also gravitating towards fleece-lined apparel:
- Fleece long-sleeve tops create a warm, moisture-managing base or mid-layer.
- Fleece knee-high socks help keep lower legs and joints warm, which is crucial in cold conditions.
- Neck warmers—especially full-cover designs that block wind from the nose to the ears—have become especially popular, with some models selling out after sales nearly doubled in a single month.
Brands Riding the Winter Running Wave
Reebok’s Floatzig 2: A Standout in the Running Shoe Category
Global sports brand Reebok, operated by LF in Korea, is benefiting from this trend. Sales of its flagship running shoe “Floatzig 2” from September to December are reportedly up around 50% year-on-year. This underscores how performance-focused running footwear is being adopted even in winter months.
Teton Bros: Lightweight Padded Outerwear Gaining Momentum
LF’s premium outdoor brand Teton Bros is seeing even more dramatic growth. Its lightweight padded jacket lineup has recorded more than a fivefold increase in cumulative sales compared with the same period last year. Lightweight insulation is clearly resonating with runners who need warmth without bulk.
Xexymix RX Line: Warm Joggers and Neck Warmers That Sold Out
Athleisure brand Xexymix has also captured the winter running market with its “RX” running collection:
- Overall RX sales volume rose 41% month-on-month last month.
- RX Men’s Hybrid Warm Jogging Pants: sales up 191% vs. the previous month.
- RX Women’s Hybrid Warm Jogging Pants: sales up 237%.
- The RX Fleece Full-Cover Neck Warmer, designed to shield from the nose to the ears, saw sales nearly double, leading to a temporary stockout.
These results highlight how purpose-built winter running apparel is moving quickly once it hits the market.
Why Winter Running Is So Effective for Weight Loss
Beyond fashion and performance, health and body composition are powerful drivers behind the winter running boom.
An orthopedic specialist, Dr. Kim Hak-yoon, has emphasized that winter running can be particularly effective for weight loss. His explanation hinges on two types of body fat:
- White fat: primarily stores energy.
- Brown fat: helps generate heat and can burn white fat in the process.
In cold conditions, brown fat becomes more active as the body works harder to maintain its core temperature. Running outdoors in the cold can therefore support greater calorie expenditure and fat utilization than the same activity under milder conditions, assuming other factors are equal.
This scientific angle helps explain why so many people are embracing cold-weather running as part of their weight management strategy.
Winter Running Safety: How to Protect Your Body in the Cold
The benefits of winter running are clear, but so are the risks if it’s done carelessly.
Warm-Up and Stretching to Prevent Muscle Injuries
In low temperatures, muscles and soft tissues are more contracted and less elastic. According to Dr. Kim, suddenly lengthening your stride or sharply increasing your speed in this state can lead to muscle damage and acute injuries.
To reduce risk:
- Perform adequate stretching and warm-up exercises before starting.
- Activate major muscle groups with dynamic movements, not just static stretches.
Managing Pace and Heart Rate in Low Temperatures
Dr. Kim also recommends limiting your speed to about 80–90% of your usual pace during winter runs. This helps the body adapt to the cold while keeping mechanical and cardiovascular stress under control.
For those with cardiovascular conditions, monitoring heart rate during exercise is essential. Cold temperatures can influence blood pressure and heart workload, so running within a safe heart-rate range is critical.
Post-Run Care: Changing Clothes and Staying Warm
After a run, sweat-soaked clothing can cause body temperature to drop quickly in the cold.
To stay safe and comfortable:
- Change into dry clothes as soon as possible after finishing your run.
- Drink warm water to help stabilize your internal temperature.
These simple practices help prevent chills, discomfort, and potential complications from prolonged exposure to cold and moisture.
How to Build a Practical Winter Running Outfit
While product choices will vary by brand and budget, the sales data and expert advice point toward some shared principles for effective winter running gear.
Layering Smartly: From Base Layers to Outer Shells
A practical winter running outfit often includes:
- A moisture-wicking base layer (e.g., a thermal or fleece long-sleeve top)
- An insulating layer (lightweight padded vest or jacket where needed)
- A weather-resistant outer layer if running in wind, snow, or sleet
This structure allows you to trap warmth, manage sweat, and adapt to changing conditions by removing or adjusting layers.
Choosing Fabrics and Fits That Support Performance
Key considerations include:
- Breathable, quick-drying fabrics to avoid clamminess and chills
- Stretch and ergonomic fit around joints (knees, hips, shoulders) for natural movement
- Targeted insulation at the core, ears, hands, and neck, which are most sensitive to cold
Items such as running-specific gloves, beanies, knee-high socks, and neck warmers can significantly improve comfort without adding much weight.
Turning Winter into an Opportunity: Final Thoughts
Winter no longer has to be a barrier to consistent training. The numbers from platforms like Musinsa and Zigzag, along with strong performances from brands such as Reebok, Teton Bros, and Xexymix, show that winter running gear is a fast-growing category.
For consumers, this presents both opportunity and choice:
- Opportunity, because winter running can boost weight loss and metabolic activity, supported by the activation of brown fat.
- Choice, because a widening range of specialized winter running shoes, apparel, and accessories is now available at different price points.
By combining verified health guidance—proper warm-up, controlled pacing, and post-run care—with carefully selected winter running gear, runners can safely turn the coldest months into some of their most productive training periods of the year.
