Our Alpha Haramaki is made for late-night and early-morning hikers and runners to help them keep warm when temperatures are low.
The advanced Polartec Alpha Direct offers excellent insulation as well as breathability keeping your belly warm.

The surface uses the same ultralight and breathable Shadow Rip fabric as the UL Shirt to maximize the Polartec Alpha Direct’s functionality, letting the heat escape while protecting the cold air.

*The material has been revised from Pertex Quantum Air to Teijin Shadow Rip since 2022.

Made in Akita, Japan

Material:
Facing: Shadow Rip (100% Polyester) 56g/m²
Lining: Polartec Alpha Direct (100% Polyester) 136g/m²
Zipper:
YKK #3 Coil Zipper
Weight:
47g (Size S)
52g (Size M)
59g (Size L)
Size:
UNISEX | S / M / L

The Alpha Haramaki is a belly band that has been developed for use during intense activity in cold circumstances, such as ridges with strong winds, snowy mountains, early mornings, and late nights.

Polartec Alpha Direct (136g/m2), which combines excellent heat insulation with good breathability, effectively repels moisture, even during high-intensity activity. The large velcro strips make it easy to put on and take off and keep the Haramaki snug while worn.

Although it is not as warm as 1000 fill power down, the slightly thick Polartec Alpha Direct (136g/m2) used in the Alpha Vest is one of the best insulators available. The Alpha Vest can be used not only in action but also when resting, always keeping you warm.

The below chart compares the 1000 fill power down and other insulators used in thermal clothes on the market.

• Heat retention is measured by JIS L1096A method, in Yamatomichi in-house test. The heat insulation property is measured from the amount of energy consumed by the heat-generating element to maintain its temperature. The maximum value is 100%.
• The values of Polartec and Primaloft fabrics are the manufacturers’ catalog specs. Other fabrics’ values are measured by Yamatomichi. 1000 fill power down includes its 7 denier nylon outer and lining.

• Excellent air-permeability and thermal performance
• Outstanding lightness and packability
• Polygiene treatment for semi-permanent antibacterial and odor-control
• Machine-washable, easy-care

Conventional natural down and synthetic insulators tend to contain body moisture within the clothes and as a result, can be quite stuffy. Polartec Alpha Direct, on the other hand, is so air-permeable that it can be worn even during a high level of physical activity.
Alpha Direct is also treated by Polygiene odor control which safely reduces the microorganisms and bacteria by small amounts of silver ions, achieving antibacterial and deodorizing function that well exceeds the lifespan of ordinary garments.

The mountain environment can be harsh; the weather is often unstable, temperature changes drastically, the wind is strong and the sunlight is intense. In these situations, it is necessary for the outdoor shirt to achieve both a high level of breathability and windproof performance at the same time. Our newly-adopted Teijin’s Shadow Rip fabric is breathable yet windproof while being light and strong.

Usually, thin and light fabrics have a ripstop structure, in which thick yarns are interwoven in a grid pattern in order to enhance tear resistance. This structure, however, often creates an unsmooth surface, causing the pilling due to weak wear resistance.

Shadow Rip is woven with fine, highly strong yarn to achieve a smooth appearance, and offers excellent resistance to snagging and abrasion while being light and strong. It is also wrinkle-proof and pilling-proof, featuring a soft texture.

Please note that the Alpha Haramaki in dark colors, such as Black, Burgundy, Duck Green, Mustard or Navy, is in contact with white or light-colored clothes for a long period of time in wet conditions, color transfer may occur. It occurs when the item is brand-new and unwashed, so please wash* it before first use to remove the extra dye in the fiber.

*Please wash separately or with like colors.

• Use neutral detergent. Machine wash below 30°C.
• Fasten zipper and velcros, and wash separately or use a laundry net bag.
• Do not bleach and do not use fabric softener.
• Wring gently. Line dry in the shade.
• Do not tumble dry.
• Do not iron. Do not dry-clean.
• If necessary, wash to remove fuzz from the fabric before first use.