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During a marathon race, founder Johnny Ku experienced a 42-kilometer sub-zero temperature course. This inspired him to spend a full year developing an excellent winter running shirt that could keep the body warm in biting cold winds and help achieve peak performance during the race.
During a marathon, founder Johnny Ku experienced the challenge of running the full 42 km course in freezing temperatures. That experience led him to spend an entire year developing the ideal winter running top—designed to keep the body warm against biting cold while supporting peak performance throughout the race.

Designed specifically for cold and damp conditions, this piece is made with Janerino® performance merino wool fabric. Advanced textile technology blends fine, soft Australian merino wool with performance synthetic fibers, enhancing durability, functionality, and all-day comfort.

Ultra-lightweight Janerino® merino wool makes this an ideal training layer for year-round wear. In cold conditions, it delivers excellent moisture-wicking, quick-drying, and odor-resistant performance. Even when wet, the fabric continues to provide warmth and helps reduce heat loss. Tested over long distances, the garment remains lightweight even as you sweat, helping you stay focused on performance without unnecessary weight.

Military-grade ripstop, water-repellent fabric reinforces high-friction areas at the elbows and shoulders. These strategically placed panels provide added durability and protection, especially when carrying a backpack during outdoor activities.


An oversized drop-shoulder silhouette, asymmetric front and back hems, and side tassel detailing are designed to create a more balanced proportion and a distinctive, contemporary look.


The ultra-lightweight care label is sewn externally to prevent irritation against the skin. When you prefer a cleaner look, simply flip it inward to keep it hidden.

A compact external pocket provides convenient storage for essentials such as cash and credit cards.

The signature hangtag is designed to be reused as a coaster, while the packaging bag can also be repurposed or recycled.

Main - 100% Janerino®
25% Merino + 75% Polyester
With - 100% Nylon
Taiwan Area
The FLIPPOS shipping service for Taiwan is using Kerry TJ Logistics. The Shipping cost cost is NT$100 in Taiwan area, free shipping for a single transaction over NT$1,500.
Hong Kong Macau Area
FLIPPOS shipping service for Hong Kong Macau area is using SF EXPRESS. The shipping cost is NT$250, free shipping for a single transaction over NT$3,000.
International Shipping In Asia
FLIPPOS shipping service for Asia (Asia, Southeast Asia, Atlantic) is using International Package of Taiwan Post Office. The shipping cost is NT$500, free shipping for a single transaction over NT$5,000.
International Shipping In Europe America
FLIPPOS shipping service for Europe United States (Europe, Middle East, America) is using International Package of Taiwan Post Office. The shipping cost is NT$700, free shipping for a single transaction over NT$6,000.
Note: International Custom Duties are not included in the shipping fee. International orders may be charged customs fees by the destination country's government and these are not included in FLIPPOS’s shipping fee.

| Size Chart | Chest Width | Overall Length | Sleeve Length |
| XXS | 48 | 68 | 64 |
| XS | 50 | 69 | 65 |
| S | 52 | 70.5 | 65.5 |
| M | 54 | 72 | 66 |
Taiwan Area
The FLIPPOS shipping service for Taiwan is using Kerry TJ Logistics. The Shipping cost cost is NT$100 in Taiwan area, free shipping for a single transaction over NT$1,500.
Hong Kong Macau Area
FLIPPOS shipping service for Hong Kong Macau area is using SF EXPRESS. The shipping cost is NT$250, free shipping for a single transaction over NT$3,000.
International Shipping In Asia
FLIPPOS shipping service for Asia (Asia, Southeast Asia, Atlantic) is using International Package of Taiwan Post Office. The shipping cost is NT$500, free shipping for a single transaction over NT$5,000.
International Shipping In Europe America
FLIPPOS shipping service for Europe United States (Europe, Middle East, America) is using International Package of Taiwan Post Office. The shipping cost is NT$700, free shipping for a single transaction over NT$6,000.
Note: International Custom Duties are not included in the shipping fee. International orders may be charged customs fees by the destination country's government and these are not included in FLIPPOS’s shipping fee.

