0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやゆよらりるれろわをん アイウエオカキクケコサシスセソタチツテトナニヌネノハヒフヘホマミムメモヤユヨラリルレロワヲン
0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやゆよらりるれろわをん アイウエオカキクケコサシスセソタチツテトナニヌネノハヒフヘホマミムメモヤユヨラリルレロワヲン
Bamboo Shirt
UNISEX
SPEC
Material
Bamboo Polyester (50% Rayon, 50% Polyester) 118g/m²
Weight
180g (Size XS)
198g (Size S)
215g (Size M)
227g (Size L)
243g (Size XL)
Made in Fukushima, Japan

Introduction

Simple, Tough & Comfortable

The Bamboo Shirt is a simple and tough trail shirt, perfect when you feel a little chilly on the trail.

Using bamboo fibers blended with polyester, the fabric is light and smooth. The shirt’s wind protection and natural moisture control performance will always keep you comfortable on the trails.

The ventilative wide fitting and open collar let the heat around the neck escape, offering comfort when it’s hot. Our proprietary design allows you to quickly roll up the sleeves, use the snap buttons for ventilation, or turn up the collar and button it up when it is cold. It effectively controls and flexibly adjusts the breathability and sensible temperature.

On and off the trails, you’ll probably be wearing it every day and never find a reason to hang it up.

Product Story

What’s so good about bamboo?

Akira Natsume, Yamatomichi Founder

We launched the development of our trail shirt series with the goal of creating something comfortable to wear both on and off the trail. We tested a number of materials during the development and were unable to narrow it down to just one, resulting in three products: the UL Shirt, Bamboo Shirt, and Merino Shirt.

Each has its own characteristics, good and bad. The UL Shirt and the Merino Shirt stand out among them, with the former being ultralight and having the strength of synthetic fibers, and the latter having the natural fiber’s powerful deodorizing and moisture control properties of 100% merino wool. Then, what is so good about the Bamboo Shirt?

Naomi Kazama, wearing the 2019 version Sand color.

The Bamboo Shirt is somewhere in between the UL Shirt and the Merino Shirt. The fabric, a blend of 50% bamboo and 50% polyester, features the toughness of synthetic fibers and the functionality of natural bamboo fibers which is similar to wool. But when written like this, it seems a bit half-baked compared to the other two products.
In fact, as we believe in creating the best products with cutting-edge functionality, we were not sure if we should commercialize this Bamboo Shirt, and even considered discontinuing its production.
Nevertheless, we continue to produce the Bamboo Shirt because we find it attractive. As mentioned above, the Bamboo Shirt has the toughness of synthetic fiber and the comfort of natural fiber, but its appeal is not limited to those functionalities; it is largely based on the atmosphere and feel of the garment.
It has a moist and comfortable texture, a subtle but elegant glossy smoothness, and a heather look of the bamboo/polyester blend.
It is wrinkle-proof and does not require sensitive handling. As you wear it, it develops a nice worn-in look.
Although not as cutting-edge as the UL Shirt or Merino Shirt, the Bamboo Shirt has a familiar and comfortable feel, which makes me always return to it. I even use the Bamboo Shirt as pajamas!
The Bamboo Shirt absorbs sweat better than the other two products. It can be worn like your favorite cotton T-shirt that endures everyday use; Wear it, wash it, repeatedly with no problem. (March 2022)

Form and Function

Excellent Humidity-control

Bamboo fibers absorb the discomforting heat and the accumulating humidity, while polyester has excellent fast-drying properties and durability. This 50/50 blend brings the best of both worlds for a tough and comfortable piece of fabric.

In a hot, humid environment, it is better to have fibers that absorb a lot of moisture to maintain a smooth texture. If the temperature is cold, it is better to use fibers that do not absorb a lot of moisture to keep comfortable and not feel too dry.

The chart below compares the moisture content inside the fibers in a hot, humid environment (a temperature of 30 degrees and 90% humidity) and an environment with optimal humidity (a temperature of 20 degrees and 65% humidity). We found that bamboo polyester maintains an optimal moisture content in both environments, and it has excellent humidity absorbency compared to a 100% polyester material.

High Deodorizing Properties

Bamboo polyester has been confirmed to have more than double the deodorizing properties that deodorized synthetic fibers have.

It neutralizes alkaline smells like ammonia and also helps to neutralize other odors because of its high ability to absorb humidity.

Natural UV Protection

The bamboo-polyester fabric naturally provides UV protection, with all colors offering a UPF rating of 20 or higher. Please note that the exact UPF value may vary depending on the color (see details below).

UPF 50+: Alaskan Blue, Dried Grass, Granite Green, Gray, Rooibos Tea, Olive Ash, Clove Brown
UPF 40: Indigo
UPF 30: Peppermint, Pale Yellow, Silver Cloud
UPF 25: Light Blue
UPF 20: White Mint

Trail Shirt

Woven fabric, which is often used as a material for shirts, is densely woven by warp and weft yarns. As a result, for the same weight and material, it is usually more windproof, dries faster, and is more durable than knitted fabrics, which are commonly used for base layers.

Furthermore, the UL Shirt adopts the basic “shirt” design, allowing for good ventilation by opening the front buttons. The essence of the shirt, the wind-protective fabric, and the good ventilation is namely the key feature of our hiking trail shirt, the UL Shirt.

The open-necked collar prevents trapping heat around your neck when it’s hot.

Snap fasteners allow you to button and unbutton the shirt quickly while on the move.

We added tucks on the back of the shirt for ease of movement and a loop to hang up the shirt.

Slits on both sides for ease of movement. A slightly longer back keeps it from crawling up when carrying a backpack.

We use pivot sleeves that widen towards the armpits so as not to interfere with arm movement.

The sleeve plackets do not contain buttons, making the sleeves easier to roll up.

Raised Collar

On a chilly morning or late evening, turn up your collar and secure it with the added button to keep out the chill. A turned-up collar also helps to prevent your neck from getting sunburned when the sun is up.

Trail Shirt Series Comparison

  • Moisture control: The property of keeping the humidity inside the garment at a constant level, dry when it’s damp, while moist when it’s too dry.
  • Breathability: Higher means better ventilation, while lower means it is more wind-protective.
  • UV protection: Ability to block the sunlight’s ultraviolet rays.

UL Shirt
Shadow Rip(100% Polyester)

Extremely lightweight, resistant to wrinkling, and highly portable, making it versatile as both activewear and change of cloth. It offers excellent usability and has a soft texture.

Merino Shirt
100% Merino Wool

Thanks to its high breathability and excellent thermoregulation and moisture-wicking capabilities, it maintains a comfortable environment within. However, in hot enviroments, it may feel warm. It has a slightly firmer texture similar to linen.

Bamboo Shirt
Bamboo Polyester (50% Rayon, 50% Polyester)

Bamboo Polyester combines the odor-neutralizing and moisture-wicking functions similar to wool with the functionality of polyester (synthetic fiber). Smooth to the touch and excels in sweat absorption compared to the other two products. The shirt becomes more unique in texture and appearance with use.

Material

Bamboo Polyester

Bamboo, a natural fiber, has excellent humidity absorbency, deodorizing properties, and block-out ultraviolet rays on par with wool. The weakness is that it is not that strong. Blending it with polyester, which has excellent durability and fast-drying properties, helped us achieve a material that can withstand rough handling when hiking and is comfortable to wear.

The bamboo fibers have a light, durable, and flexible feel. Traditionally bamboo has been widely used in Asia in a variety of products from food packaging to woven goods. Bamboo also grows extremely fast and can be harvested after only 2-3 years so is a very environmentally sound material.

The 50/50 bamboo/polyester blend has a unique cool, silky texture that doesn’t wrinkle easily even if stuffed somewhere in your backpack. The polyester also adds a nice glossy shine to the fabric making you stand out on the trail.

Bamboo Polyester
Material
50% Polyester, 50% Rayon
Weight
118g/㎡
Tear strength (JIS L 1096 D)
Vertical: 2kg Horizontal: 2kg
The load required to tear a notched specimen during a tensile test.
Tensile strength (JIS L1096A)
Vertical: 58kg Horizontal: 36kg
The maximum load during constant-speed tensile testing until failure.
Air-permeability (JIS L1096A)
19.5cc/(㎠・s)
The airflow rate when air is drawn through the specimen at a constant pressure
UPF Rating:
20+
UPF (Ultraviolet Protection Factor) indicates how much more protection the fabric provides compared to bare skin. A UPF 30 rating means it delays sunburn 30 times longer than without protection.

Size guide

Size chart

Unisex
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

Product dimensions

Unisex
Unit:cm
Size XS S M L XL
着丈 / Length 67 70.5 72.5 74.5 76.5
肩巾 / Shoulder Width 39.5 42.5 44.5 47.5 51.5
Body Width 53 58 60.5 64.5 69.5
Hem Width 49.5 54.5 57 61 66
Sleeve Length 55 60.5 61.5 63 64.5
Sleeve Opening 9.5 10 10.5 11 11.5
  • There may be differences between the actual dimensions and the dimensions stated due to shrinking and sewing errors.
  • Fabric may shrink from wear and tear or frequent washing, causing dimensions to change over time.

Fitting

Atsushi 169cm 54kg
Size M (Dried Grass)

Atsushi 169cm 54kg
Size M (Dried Grass)

Shiori 167cm 55kg
Size S (Rooibos Tea)

Shiori 167cm 55kg
Size S (Rooibos Tea)

Atsushi 169cm 54kg
Size S (Alaskan Blue)

Atsushi 169cm 54kg
Size M (Dried Grass)

Beyonce 169cm 63kg
Size S (Light Blue)

Beyonce 169cm 63kg
Size M (Gray)

Ryo 170cm 60kg
Size S (Light Blue)

Ryo 170cm 60kg
Size M (Peppermint)

Oji 176cm 60kg
Size M (Rooibos Tea)

Oji 176cm 60kg
Size L (Gray)

Pony 173cm 76kg
Size L (Dried Grass)

Pony 173cm 76kg
Size XL (Light Blue)

Tsuka 183cm 65kg
Size L (Dried Grass)

Tsuka 183cm 65kg
Size XL (Gray)

Kenken 183cm 77kg
Size L (Dried Grass)

Kenken 183cm 77kg
Size XL (Rooibos Tea)

Moss 182cm 95kg
Size XL (Peppermint)

Atsushi 169cm 54kg
Size S (Alaskan Blue)

Atsushi 169cm 54kg
Size M (Dried Grass)

Beyonce 169cm 63kg
Size S (Light Blue)

Beyonce 169cm 63kg
Size M (Gray)

Ryo 170cm 60kg
Size S (Light Blue)

Ryo 170cm 60kg
Size M (Peppermint)

Oji 176cm 60kg
Size M (Rooibos Tea)

Oji 176cm 60kg
Size L (Gray)

Pony 173cm 76kg
Size L (Dried Grass)

Pony 173cm 76kg
Size XL (Light Blue)

Tsuka 183cm 65kg
Size L (Dried Grass)

Tsuka 183cm 65kg
Size XL (Gray)

Kenken 183cm 77kg
Size L (Dried Grass)

Kenken 183cm 77kg
Size XL (Rooibos Tea)

Moss 182cm 95kg
Size XL (Peppermint)

Nana 151cm 47kg
Size XS (Peppermint)

Peipei 154cm 45kg
Size XS (Rooibos Tea)

Miho 159cm 51kg
Size XS (Gray)

Miho 159cm 51kg
Size S (Alaskan Blu)

Misako 161cm 49kg
Size XS (Peppermint)

Misako 161cm 49kg
Size S (Dried Grass)

Kanade 161cm 56kg
Size XS (Light Blue)

Kanade 161cm 56kg
Size S (Dried Gras)

Chihiro 168cm 55kg
Size S (Alaskan Blue)

Chihiro 168cm 55kg
Size M (Gray)

Maho 170cm 50kg
Size S (Dried Grass)

Maho 170cm 50kg
Size M (Granite Green)

Ai 172cm 55kg
Size M (Granite Green)

Ai 172cm 55kg
Size L (Dried Grass)

Nana 151cm 47kg
Size XS (Peppermint)

Peipei 154cm 45kg
Size XS (Rooibos Tea)

Miho 159cm 51kg
Size XS (Gray)

Miho 159cm 51kg
Size S (Alaskan Blu)

Misako 161cm 49kg
Size XS (Peppermint)

Misako 161cm 49kg
Size S (Dried Grass)

Kanade 161cm 56kg
Size XS (Light Blue)

Kanade 161cm 56kg
Size S (Dried Gras)

Chihiro 168cm 55kg
Size S (Alaskan Blue)

Chihiro 168cm 55kg
Size M (Gray)

Maho 170cm 50kg
Size S (Dried Grass)

Maho 170cm 50kg
Size M (Granite Green)

Ai 172cm 55kg
Size M (Granite Green)

Ai 172cm 55kg
Size L (Dried Grass)

Notes before use

Fabric Discoloration

  • Due to the nature of the fabric, areas subject to friction—such as where a backpack makes contact—may develop slight pilling over time. With continued use, this can lead to changes in texture and appearance, adding character unique to the material.
  • The dye may react to chlorine, causing discoloration. This is particularly true when exposed to high concentrations of chlorine, such as in chlorine-based bleach. Discoloration may also occur from the chlorine found in tap water. Avoid soaking the fabric for extended periods.

Instructions

Care Instructions

  • Machine wash below 40°C.
  • Wash separately or use laundry net bag.
  • Tumble dry below 60°C.
  • Line dry in the shade.
  • Do not bleach and do not use fabric softener.
  • Iron on low, cover the pants with a cloth. Do not steam.
  • The material, made from natural bamboo fibers, may get fuzzy and white marks due to friction with your backpack.

Care Instructions Page

For detailed tips on how to wash, store, and take care of your gear, visit our Care Instructions page.

Payment

  • We only accept payment by credit card. We currently do not accept payment via bank transfer from overseas accounts.
  • We accept the following Credit Cards: Visa, Master, American Express, and JCB.
  • To download your receipt, please click the link included in the Dispatch Notice, which we will send by email as soon as the items are dispatched.
  • Bank transfer is only availble for those that own a Japanese bank account.

Delivery

  • Order Confirmation will be sent after the order.
  • The items will be dispatched within 3 days after the payment is confirmed.
  • The dispatch notice will be sent by email as soon as the items are dispatched.
  • The delivery may be delayed by unforeseeable reasons such as natural disasters and other logistics issues. We appreciate your patience and understanding.
  • We cannot ship multiple orders in one package due to how our delivery system is currently set up.
  • We will ship to regions in North America, Oceania, and Europe (excluding Russia) via DHL. For regions in Asia, the Middle East, Central and South America, Africa, and Russia, we use EMS (International Express Mail Service) for shipping.
  • Shipping fees and delivery times vary depending on the shipping destination as well as the size and weight of the items.

Size Exchange

  • Overseas customers who need to change the size of their order, should note that the time needed for shipping will vary greatly depending on your country of residence.
  • We only accept exchanges when the item is unused (except for fitting).
  • If you wish to exchange the size of the item, please contact us within seven days of receiving your order.
  • Exchanges can only be made for the same color in a different size.
  • If the size you wish is out of stock, we will suggest a different color.
  • If the product is out of stock, we may simply have to ship the item back to you.
  • All shipping costs to be carried by the customer.
  • We will only send the exchanged item to you, upon receipt of return shipping cost via PayPal.
  • Please be aware that some countries charge customs duties depending on the price of the item.
  • We are unable to answer any questions on local customs. Please contact your local customs bureau.

Repair

We accept repairs for all of our Yamatomichi products. For inquiries on repair services including patching the holes, repairing with extra components, or fixing the items damaged over time, please feel free to contact us from the “Repair” section of the SUPPORT page.