144g
¥43,000（税込）
Introduction
When hiking a steep incline, windy ridgeline, or in the pouring rain, this All-weather Activewear keeps you comfortable anytime, anywhere.
Our All-weather series, using the Pertex Shield Air, is significantly lighter than other conventional breathable moisture-permeable jackets. The fabric’s superior breathability makes the jacket unbelievably comfortable, making it work as a windshell or as a rain jacket.
The UL All-weather Jacket features a chest pocket for stowing the jacket itself and a double zipper design, achieving easy ventilation when you are pushing hard to climb a steep hill. Additionally, the snap buttons on the armholes enable quick sleeve adjustments in warmer conditions or function as thumbholes in colder weather, making it a true “All-weather” jacket.
Product story
Akira Natsume, Yamatomichi founder
The UL All-weather series is quite different from your regular rainwear.
It’s best to think of it as a new category of gear altogether. Some caution is needed when using, but if used right it will take you even further.
Hideki Toyoshima, wearing the Black color.
つづきを読む
With proper use, it will bring you overwhelming comfort and joy on your next hike.
I first heard about Pertex Shield Air, the material adopted for the UL-All-weather series, about three years ago. At the time, we were conducting research on rainwear at the Yamatomichi Lab. Interested in our research results, Pertex contacted us and provided us with sample fabrics of the Pertex Shield Air before it was officially released.
Initially, I thought that with Pertex Shield Air I could make new rainwear that was simply lighter and more breathable than the NeoShell (an air/moisture-permeable waterproof fabric).
However, the potential for the fabric was far more profound than that. During a field test I conducted at Taisetsuzan Hokkaido at the end of August, I realized that there was a need to differentiate this amazing fabric from traditional rainwear.
There are no trees on the ridges of Taisetsuzan in Hokkaido, and no place to take refuge. In this environment, with strong winds and light rain, I wore a prototype jacket using Pertex Shield Air and was pleased with the comfort and dryness it provided in active situations. However, I noticed that my body heat was immediately ventilated outside during my breaks.
Rainwear is usually known to protect you from the wind and is able to somewhat retain body heat. The All-weather series is different. It is as if the jacket is telling you “Don’t stop moving!” We can’t deny the benefits it brings in terms of dryness, and breathability, but we also cannot deny the lack of heat retention when resting. In other words, it is difficult to keep warm with this garment alone, especially in bad weather.
To be honest, I was a bit worried. I thought that if the wearer used this fabric without knowing its flaws, it could be truly dangerous.
For ages, I have been wishing for rainwear that could be worn at all times, and rainwear that had a little bit more breathability. I went as far as thinking that fabrics that weren’t breathable were no good. But that was not the case. Excellent breathability will vent the heat out but will lead to less heat retention in bad weather. On the contrary, rainwear with high thermal insulation tends to trap heat and become stuffy during activities.
While it excites me that the gear I wanted took shape, I also worried at times. I’ve come to realize that the Pertex Shield Pro, the fabric used for our UL Rain series, has a good balance of warmth and breathability.
But in the end, I decided to release this product because I was thrilled that the answer I had been seeking for many years had finally taken shape and because I truly felt from the bottom of my heart that this fabric would make very interesting gear.
Choosing the right gear may differ depending on its purpose. There is no doubt that this is a garment that active hikers and trail runners have been on the lookout for many years, but it may not be the best fit for those who are not looking to stay highly active while hiking.
To conclude, I could have used a lighter material, but since I decided to use the name “All-weather,” I wanted to maintain a certain level of durability and strength, as well as a sense of elasticity, so I was particular about the combination of outer and inner fabrics for the garment. Ultrasonic welding has also evolved.
At first glance, you may think, “What’s changed from the UL Rain series?”
But trust me, they are very different.
(June 2021)
Form and function
The UL All-weather Hoody offers overwhelming breathability compared to conventional rainwear. It has evolved into a new product category we call “All-weather Activewear” equally suitable for sunny and rainy days.
Its excellent ventilation performance lets the heat out and keeps you dry when running or going uphill, even when normal rainwear is too humid and warm to wear. The 10,000mm water pressure resistance will protect you from getting wet in case of sudden rain.
The chart below shows a comparison between the UL All-Weather Series and general mountaineering rainwear (assumed to be products weighing 200-300g that use breathable waterproof membranes such as Gore-Tex).
General rainwear tends to have excellent insulation, but poor breathability and a tendency to trap heat. However, the UL All-Weather Series is lightweight, highly breathable, and does not trap heat even during intense activity.
However, due to its high breathability, the UL All-Weather Series may sometimes make the wearer feel cold in strong winds. Therefore, proper layering is necessary when using it to ensure warmth.
What’s so special about the Pertex Shield Air? It’s a novel nanofiber fabric that is permeable not only by moisture but also by air. This air/moisture-permeability creates a truly unique kind of breathability.
We tested the breathability of the Pertex Shield Air of the UL All-weather series and the existing UL Rain Hoody (PU Shinsui), the Pertex Shield fabric. The test method is as follows:
The test fabric is placed in the middle of the tester. The upper half of the tester has some water in it, while the lower half is empty (filled with air). When the lower half is pressurized by the pump, the fabric lets the air pass, and bubbles are created in the upper half. The more air that passes through, the more bubbles are created. The Pertex Shield with no air-permeability does not generate air bubbles. On the other hand, the Shield Air creates many air bubbles, indicating its high air-permeability.
The large pocket added from the 2023 model, can hold snacks, maps, and other essential items for hiking. It is placed at the front where the usability of the sternum strap is not compromised.
The Coat can be neatly packed in the large front pocket.
The double zipper allows it to be opened and closed from either the top or bottom for quick ventilation. This ensures you will stay comfortable in the ever-changing mountain conditions, including climbing ridges in high winds after a hard hike up.
Usually, the stitching of the rainwear is seam-taped from the back to prevent water penetration. However, seam tape lacks durability, and water may seep through seams due to deterioration over time.
The UL All-weather series adopts ultrasonic welding, the latest technology that melts and welds the fabrics together by the heat of ultrasonic vibration. This method creates no stitch holes with less damage to the fabric, minimizing the risk of water penetration from the seams due to deterioration with age.
Yamatomichi has teamed up with one of a few craftsmen and factories in Akita Prefecture that are capable of ultrasonic welding and is developing new technologies to make better products.
New technology allows the fabric to be layered and then welded together, making it even more durable, stronger, and waterproof than its predecessor, the UL Rain series.
The neck is designed to allow you to move your neck without stress. The brim is filled with a thick core to drain rainwater.
The heat of the ultrasonic welding creates a unique trace.
The sleeves can be quickly rolled up by unbuttoning the snap buttons at the wrist.
The space between the snap buttons can be used as thumbholes.
You can adjust the fit of the hems with the cords on both sides.
YKK No.3 water-resistant Vislon double zipper has a matte texture and can be opened and closed from both above and below.
There is a cord lock on the inside of the hood fabric that adjusts the hood. Press the cord lock and pull the cord under the hood to adjust.
Other than the double-zippered “Jacket”, the UL All-weather series includes: The zipperless ultralight “Hoody”, lengthened “Long Hoody”, zippered, pocketed, and packable “Coat”, and a pair of “Pants”. The features of each product are as follows:
Weight: 106g (Size S)
Features: The lightest among the series. No-zipper design allows for lightness and comfort.
Application: UL Hiking
Weight: 134g (Size S)
Features: Much lighter than the set of rain jacket and pants. Long enough to wear without rain pants, offering a sense of freedom around the legs.
Application:
Ultralight hiking. The length makes it difficult to see your feet, so use it with caution on rocky ridges.
Weight: 192g (Size XS)
Features: Packable with large front pocket. Waterproof Vislon zipper.
Application: Daily use. Ultralight hiking. The length makes it difficult to see your feet, so use it with caution on rocky ridges.
Weight: 77g (Size S)
Features: Waterproof yet air-permeable. Can be worn on the move even when sunny.
Application: Ultralight hiking. Trail running. Fast-packing.
UL All-weather Jacket
Weight: 125g (Size XS)
Features: Double-zipper allows for easy ventilation and taking off/putting on
Applicaion: Trail running, fast-packing.
Precautions
Most rainwear provides a certain level of heat retention by allowing moisture to build up inside of the garment. However, the UL All-weather series has overwhelming breathability, and the heat generated by the body is always ventilated outside the garment. Keep in mind that you will need to be creative with your layering if you want to focus on keeping warm when resting.
So, we’d like to introduce the layering suggestions for the All-weather series by Tomoyoshi Tsuchiya (Hikers Depot), Kei Kuwabara (Run boys! Run girls!), and Yamatomichi Lab (Akira Natsume and Takahiro Watanabe), who collaborated with us in ”Yamatomichi Lab Special Issue: All-weather Activewear #3: Tomoyoshi Tsuchiya x Kei Kuwahara x Yamatomichi Lab Trilogy”
つづきを読む
+Sil-Poncho (Trail Bum Gnu Cape)
A UL hiker’s classic, a sil-nylon poncho but not as rain gear, but as an extra layer to improve warmth. The combination of rain gear and rain gear may seem odd at first glance, but it is a rational layering that uses the lightweight poncho to compensate for the lack of warmth of the highly-breathable All-weather jacket.
+Synthetic Insulation (Trail Bum Boaster Jacket)
A synthetic fiber insulation, worn like a belay jacket. The synthetic fiber cotton will not lose its warmth even if it gets a little wet, and it is windproof with few cold spots.
+First Layer (Onyone Breath Tech PP)
In running, the sweat you produce during exercise tends to lower your body temperature during when not moving. By wearing a hydrophobic first layer under your base layer, you can prevent sweat from adhering to the surface of your skin, which in turn prevents cold sweats.
+Lightweight insulation (The North Face VENTRIX Trail Jacket)
Kuwabara’s idea for layering was based on what would fit in his trail running bag. He chose a 150g lightweight trail running insulation jacket, A windshell binded with thin insulation, to go with the All-weather to keep his body warm when not moving.
+Active Insulation (Yamatomichi Alpha Vest)
The founder and director Akira, layered a Polartec Alpha Vest from Yamatomichi, which will be released this upcoming fall. The highly breathable All-weather and the equally breathable active insulation are a perfect match.
+Emergency Blanket (SOL Survival Blanket)
An emergency blanket that doubles up as groundsheet and a blanket. The fundamentals in reducing weight is to have multi functional gear. UL hikers who want to do The emergency blankets are ultralight and surprisingly great at retaining heat.
+Sleeves (C3 Fit Inspiration Arm Sleeves)
Watanabe is a runner who likes high-intensity trail running. When layering over short sleeves, no matter how breathable the all-weather material is, the arms that are in direct contact with the bare skin can feel uncomfortable and cold due to sweat clinging to them, which can be eliminated by wearing arm covers.
+Merino & Haramaki (Yamatomichi Alpha Haramaki & 100% Merino Hoody)
The moisture-wicking Yamatomichi Merino Hoody as an inner layer, combined with the breathable Polartec Alpha Haramaki wrapped around the stomach, allows you to prevent overheating, while also preventing cold sweats, especially at night or in bad weather.
Review
The UL All-weather prototypes were tested by HLC ambassadors all over Japan during the fall, winter, and spring. They all found the UL All-weather to be extremely breathable but also felt that they needed to be a little creative in the application.
Tetsu, a loving father of three girls, runs thea mountain gear store “T-mountain,” at the foot of Matsuyama Castle in Shikoku. He loves to run, climb, snowboard, and hike, and has been traveling to major mountains in Japan and abroad since his twenties. In recent years, he has found a deep connection in the mountains he grew up around, in his local area in Shikoku.
Hiroki moved to New York in his teens, and became immersed in dance and street culture. After returning to Japan, he rediscovered the mountains that he had been familiar with as a child and began enjoying nature all year long through hiking, bag-country skiing, climbing, trail running, and river trekking. He established the outdoor store “Knotty” in Shiwa-machi, Iwate Prefecture, to promote safe and fun mountain activities, and is constantly striving to find a sense of groove with nature, mountains, and people.
Yoshitaka moved to Niseko, Hokkaido in 2009 to open the SPROUT coffee shop, in 2019 he opened Camp&Go, a place where you can enjoy coffee and the outdoors. He currently spends his time studying coffee, hiking, skiing, kayaking, and being active in the Niseko mountain range.
When Tomoyuki was 20 years old, he climbed Mt. Nasu with a friend and was left deeply impressed. Tomoyuki first encountered UL culture when he picked up a Yamatomichi Sacoche. Around the same time, he also discovered the beauty of making his own gear, and found joy in going hiking with tools that he had made by hand. After retiring from a camera manufacturer, he joined the staff of LUNETTES. Besides hiking, he is also into fly fishing and telemark skiing.
While wandering around with a camera in hand, Yuji became fascinated by the lifestyle and culture of mountain tribes in Tibet, Karakoram, Ladakh and their overwhelming landscapes. In April 2020, he opened his own shop, Yamadogu Taninokisha, while running an apparel company that sells handicrafts from around Asia and the Middle East. His favorite thing to do is explore mountains and drink hard liquor while camping with ultralight gear.
Hideki Toyoshima is a hiker, telemark skier, surfer, art curator, vegetarian, and off-grid enthusiast—constantly moving between the worlds of art and outdoor adventure. With a diverse creative background, he is involved in planning, writing, editing, filmmaking, and directing. Splitting his time between Kyushu and Hokkaido, he embraces a lifestyle deeply connected to nature, art, and exploration.
Related Yamatomichi Journals
With the launch of the UL All-weather Series, we’ve created a special three-part feature in our Journal.
This in-depth series explores the technology behind waterproof-breathable materials, including a close look at next-generation fabrics like Pertex® Shield Air. It also includes actual wear tests conducted at certified testing facilities, and a roundtable discussion with Tomoyoshi Tsuchiya of Hiker’s Depot and Kei Kuwahara of Run boys! Run girls! Together, we examine the current state of rainwear in the outdoor scene.
More than just a deep dive into the UL All-weather Series, this feature serves as an excellent resource for understanding the present and future of rainwear.
山と道ラボ 特別編 2021.06.18
山と道ラボ 特別編 2021.06.19
山と道ラボ 特別編 2021.06.28
Material
Size guide
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Weight (kg) | 42~53 | 51~61 | 59~69 | 67~78 | 76~85 |
| Chest (cm) | 78~84 | 80~88 | 84~95 | 92~102 | 100~110 |
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Length | 69 | 74 | 76 | 78 | 80 |
| Body width | 56.5 | 56.5 | 58.5 | 61.5 | 67.5 |
| Hem width | 54 | 54 | 56 | 59 | 65 |
| Neck to sleeve | 83 | 86.5 | 88.5 | 92 | 95 |
| Sleeve opening | 9 | 9.5 | 10 | 10.5 | 11 |
Beyonce 169cm 63kg
Size S (Deep Forest)
Kanade 161cm-51kg
Size XS (White)
Atsushi 169cm 54kg
Size S (Black)
Atsushi 169cm 54kg
Size M (Deep Forest)
Oji 176cm 60kg
Size M (Smoke Brown)
Oji 176cm 60kg
Size L (Teal)
Pony 173cm 76kg
Size L (Black)
Pony 173cm 76kg
Size XL (Deep Forest)
Tsuka 183cm 65kg
Size L (Teal)
Tsuka 183cm 65kg
Size XL (Deep Forest)
Kenken 183cm 77kg
Size L (Black)
Kenken 183cm 77kg
Size L (Deep Forest)
Reona 155cm 48kg
Size XS (Smoke Brown)
Reona 155cm 48kg
Size S (Teal)
Eriko 158cm 47kg
Size XS (Smoke Brown)
Eriko 158cm 47kg
Size S (Teal)
Miho 159cm 51kg
Size XS (Black)
Miho 159cm 51kg
Size S (Deep Forest)
Misako 161cm 49kg
Size XS (Smoke Brown)
Misako 161cm 49kg
Size S (Teal)
Kanade 161cm 56kg
Size S (Black)
Kanade 161cm 56kg
Size M (Deep Forest)
Shiori 167cm 55kg
Size S (Smoke Brown)
Shiori 167cm 55kg
Size M (Teal)
Maho 170cm 50kg
Size S (Black)
Maho 170cm 50kg
Size M (Deep Forest)
Ai 172cm 55kg
Size M (Smoke Brown)
Ai 172cm 55kg
Size L (Teal)
Notes before use
Thicker fabrics tend to hold water-repellent treatments better, but the UL All-weather Series uses ultra-thin, highly breathable outer fabrics to keep things light and airy. That means while the water repellency is solid when shipped, it won’t last as long as heavier waterproof-breathable materials.
When the DWR is working, water beads up and rolls off. Once it starts to wear out, water spreads across the surface like a film, blocking breathability and making the inside feel damp or clammy.
If it feels like the water repellency is fading, toss it in the dryer or hit it with a hairdryer after washing—it’ll help bring it back. If that doesn’t do the trick, reapply a water-repellent treatment using a product from your local gear shop.
This shell is built for comfort while you’re on the move in mild conditions. It doesn’t insulate like heavier waterproof or winter shells, so when you stop or need extra warmth, make sure you’ve got the right layers.
If you’re heading into harsh environments, don’t take it lightly—plan your layering accordingly.
Instructions
Care instruction page
For more detailed washing, drying and water repellent care instructions, visit our SUPPORT Page. With proper care you can prolong the funtionality of the product.
当製品1点のみご購入の場合、配送料のお得な日本郵便の「ゆうパケット」が利用できます（沖縄県・離島を除く）。
送料：300円
他製品を含む2点以上ご購入の場合は佐川急便で発送します（沖縄県、離島のお客様はヤマト運輸で発送します）。
送料：500円／950円（沖縄県）
ご購入後、製品のサイズが合わなかった場合は交換対応いたします。交換に際し以下の内容をご確認のうえ、SUPPORTページ内の「サイズ交換・不良品サポート」よりお申し込みください。
山と道ではすべての製品の修理を受け付けています。穴あきやパーツ補修、経年による劣化など、修理のご相談はSUPPORTページ「修理について」よりぜひお気軽にお寄せください。
MORE