Skip to product information
1 left
MEN
WOMEN
山と道の通販ご利用の方は必ずお読み下さい。
・同一商品を多数注文頂いた場合、ご注文をキャンセルさせて頂く場合がございます。
・当店では、資源の有効活用・環境面より簡易包装を心がけております。山と道の一部の商品は化粧箱に入って管理されております。そのような商品の梱包も基本【紙袋】となり、配送中に化粧箱が凹んでしまう場合がございます。
Product Description
Yamato Michi 100% Light Merino Long-Sleeve (Unisex)
■Excerpt from the manufacturer's description
Simple long-sleeve shirt
A lightweight (150–160 g/m²) merino long-sleeve shirt that’s perfect for wearing as a base layer against bare skin.
With the soft feel unique to 100% merino wool, powerful natural odor-neutralizing properties that keep it fresh even after days of wear, and temperature- and humidity-regulating features that keep you cool in summer and warm in winter, this garment ensures your comfort at all times. Plus, it’s machine-dryable (up to 60°C), so be sure to pack it for your next long trip.
*Changes to the 2026 Model
We have revised our dyeing method from "yarn dyeing"—where the yarn is dyed before weaving—to "piece dyeing," where the fabric is dyed after it has been woven.
■Features and Design
〇The Positioning of 100% Light Merino
Although it dries more slowly than synthetic base layers, it minimizes the cooling effect caused by the latent heat of evaporation from sweat, thereby reducing the risk of hypothermia due to moisture. While it prioritizes moisture-wicking and thermal insulation over quick-drying and cooling properties, the fabric is thin and highly breathable, making it a great choice for active wear during summer mountain hikes.
Recommended for situations like this
"There are significant temperature fluctuations"
Wool has the ability to maintain a consistent temperature inside clothing, keeping you comfortable even in conditions with extreme temperature fluctuations.
"Put on the shell"
Base layers made of synthetic fibers with low moisture-wicking properties tend to trap moisture and become stuffy when worn under a shell, as they cannot dry quickly enough. However, 100% Light Merino, with its high moisture-wicking properties, effectively regulates humidity inside the garment, so you won’t feel stuffy even when wearing a shell to protect against wind and rain.
"Long operating time"
Even when treated with antibacterial and odor-resistant finishes, synthetic fabrics tend to develop an unpleasant odor just a few hours after sweating, and many people are reluctant to wear them the next day even after they’ve dried. Wool, on the other hand, has extremely powerful natural odor-neutralizing properties; even after heavy sweating, the odor virtually disappears once the fabric dries, making it relatively comfortable to wear the next day and beyond.
"I want to lighten my load"
As described above, a single garment can adapt to a wide range of environmental conditions, minimizes odor issues, and allows for extended wear, enabling you to pack lighter by reducing the number of changes of clothes.
○ Powerful natural deodorizing properties
Merino wool is said to "stay odor-free even after wearing it for a week," and it offers significantly better odor control than synthetic fibers treated with deodorizing agents.
While much remains unknown about the mechanism behind this odor-neutralizing effect, one theory suggests that wool has an extremely high capacity to absorb odor-causing compounds, trapping them within its fibers at levels undetectable to the human sense of smell.
• Cool in summer and warm in winter, with natural humidity-regulating properties
Often referred to as "nature's air conditioner," merino wool regulates the temperature and humidity inside your clothing, ensuring a comfortable fit.
This dual property—keeping you cool in hot weather and warm in cold weather—is due to two factors: first, the natural crimp in the wool fibers, known as “crimp,” creates air pockets within the fabric, ensuring high breathability and moisture permeability; and second, the cortex—the outer layer of the fiber—absorbs moisture in response to the humidity of the surrounding air, absorbing more moisture as humidity increases.
The air pockets created by the "crimp" act as loft, retaining heat in the same way as down or synthetic fiber fill, and provide superior insulation compared to cotton or synthetic fibers of the same weight.
• Stays warm even when wet, helping to prevent hypothermia
When wool gets wet, it generates "absorption heat." Because of its low thermal conductivity, it does not easily draw heat away from the body. Even when wet, the fibers retain their elasticity and do not collapse, allowing them to trap air between the fibers and maintain excellent insulation. Furthermore, wool has the ability to absorb moisture into the fibers, wicking it away from the skin to keep you feeling dry.
• 100% merino wool—tumble dry safe
While many merino wool products shrink or lose their shape when tumble-dried, Yama to Michi’s proprietary 100% merino wool offers dimensional stability that allows it to be tumble-dried at low temperatures (up to 60°C). Since you can dry it in a tumble dryer at hotels or laundromats while traveling, you can pack fewer changes of clothes for long-distance hikes and trips.
■Material：100% Merino Wool, 150-160g/m2
■Weight：
・135 g (Size XS)
・153 g (Size S)
・168g (Size M)
・183g (Size L)
・193 g (Size XL)
■Product Dimensions (cm) *From the manufacturer's website
[XS] Length: 60.5, Body width: 43.5, Hem width: 42.5, Sleeve length: 70, Cuff width: 9.5
[S] Length: 64, Body width: 48.5, Hem width: 47.5, Sleeve length: 76, Cuff width: 9.5
[M] Length: 67, Body width: 51, Hem width: 50, Sleeve length: 78.5, Cuff width: 10
[L] Length: 69, Body width: 55, Hem width: 54, Sleeve length: 81.5, Cuff width: 10.5
[XL] Length: 71, Body width: 59, Hem width: 58, Sleeve length: 84.5, Cuff width: 11
*Due to the nature of the fabric, some shrinkage or stretching may occur after washing; however, the garment has been tailored to account for this shrinkage and stretching after washing and drying.
・The figures above are for the product in its unwashed state at the time of purchase.
・Product sizes may vary by 1–2 cm.
・There may be slight variations in shrinkage rates, and these may vary depending on the type of washing machine or the cycle settings.
・Using a dryer on a low-temperature setting may cause the garment to shrink more than it would if air-dried, but this can be remedied by washing it again and hanging it to dry.
・If you notice shrinkage after washing and drying, you can fix it by stretching the fabric while ironing it with a steam iron.
■Precautions for Use
○ About dye transfer on fabric
Please note that this product may cause color transfer if it rubs against white or light-colored shirts that are wet from sweat or rain.
○ About Using the Dryer
You may use the dryer on a low-temperature cycle (maximum 60°C). However, please avoid using this setting frequently, as it can cause the fabric to pill or shed fibers. If the fabric dries while folded or wrinkled, the wrinkles will set once the garment cools. Therefore, do not use a laundry net; instead, dry the item on its own or in a machine with ample space. Remove the item promptly after drying.
*Note: Using a dryer may cause the garment to shrink by 1–2 cm in length, but this can be corrected by washing and line-drying it again.
■Product Care
・Merino wool can become prone to moth damage if body oils build up. Please wash it regularly.
・When storing the product, please use moth repellents and take measures to keep it in an airtight container to prevent insect infestation.
・Yama to Michi’s 100% merino wool fabric is resistant to shrinkage, so it can be washed in a washing machine on a gentle cycle—such as the “delicate” or “fine wash” setting—which uses a gentle water flow to wash delicate garments.
・Regular detergents remove too much of the natural oils found in wool, which can cause the dye to run and lead to color fading. When washing, please use a mild detergent designed for delicate fabrics.
・Because the fibers are short, pilling and fuzz may occur; however, as you wash the item, some of the fuzz will shed, and pilling will become less likely.
*Please note that the images shown are provided by the manufacturer, so the actual product may differ slightly in terms of specifications (such as logo placement, color, or pattern placement).
■Excerpt from the manufacturer's description
Simple long-sleeve shirt
A lightweight (150–160 g/m²) merino long-sleeve shirt that’s perfect for wearing as a base layer against bare skin.
With the soft feel unique to 100% merino wool, powerful natural odor-neutralizing properties that keep it fresh even after days of wear, and temperature- and humidity-regulating features that keep you cool in summer and warm in winter, this garment ensures your comfort at all times. Plus, it’s machine-dryable (up to 60°C), so be sure to pack it for your next long trip.
*Changes to the 2026 Model
We have revised our dyeing method from "yarn dyeing"—where the yarn is dyed before weaving—to "piece dyeing," where the fabric is dyed after it has been woven.
■Features and Design
〇The Positioning of 100% Light Merino
Although it dries more slowly than synthetic base layers, it minimizes the cooling effect caused by the latent heat of evaporation from sweat, thereby reducing the risk of hypothermia due to moisture. While it prioritizes moisture-wicking and thermal insulation over quick-drying and cooling properties, the fabric is thin and highly breathable, making it a great choice for active wear during summer mountain hikes.
Recommended for situations like this
"There are significant temperature fluctuations"
Wool has the ability to maintain a consistent temperature inside clothing, keeping you comfortable even in conditions with extreme temperature fluctuations.
"Put on the shell"
Base layers made of synthetic fibers with low moisture-wicking properties tend to trap moisture and become stuffy when worn under a shell, as they cannot dry quickly enough. However, 100% Light Merino, with its high moisture-wicking properties, effectively regulates humidity inside the garment, so you won’t feel stuffy even when wearing a shell to protect against wind and rain.
"Long operating time"
Even when treated with antibacterial and odor-resistant finishes, synthetic fabrics tend to develop an unpleasant odor just a few hours after sweating, and many people are reluctant to wear them the next day even after they’ve dried. Wool, on the other hand, has extremely powerful natural odor-neutralizing properties; even after heavy sweating, the odor virtually disappears once the fabric dries, making it relatively comfortable to wear the next day and beyond.
"I want to lighten my load"
As described above, a single garment can adapt to a wide range of environmental conditions, minimizes odor issues, and allows for extended wear, enabling you to pack lighter by reducing the number of changes of clothes.
○ Powerful natural deodorizing properties
Merino wool is said to "stay odor-free even after wearing it for a week," and it offers significantly better odor control than synthetic fibers treated with deodorizing agents.
While much remains unknown about the mechanism behind this odor-neutralizing effect, one theory suggests that wool has an extremely high capacity to absorb odor-causing compounds, trapping them within its fibers at levels undetectable to the human sense of smell.
• Cool in summer and warm in winter, with natural humidity-regulating properties
Often referred to as "nature's air conditioner," merino wool regulates the temperature and humidity inside your clothing, ensuring a comfortable fit.
This dual property—keeping you cool in hot weather and warm in cold weather—is due to two factors: first, the natural crimp in the wool fibers, known as “crimp,” creates air pockets within the fabric, ensuring high breathability and moisture permeability; and second, the cortex—the outer layer of the fiber—absorbs moisture in response to the humidity of the surrounding air, absorbing more moisture as humidity increases.
The air pockets created by the "crimp" act as loft, retaining heat in the same way as down or synthetic fiber fill, and provide superior insulation compared to cotton or synthetic fibers of the same weight.
• Stays warm even when wet, helping to prevent hypothermia
When wool gets wet, it generates "absorption heat." Because of its low thermal conductivity, it does not easily draw heat away from the body. Even when wet, the fibers retain their elasticity and do not collapse, allowing them to trap air between the fibers and maintain excellent insulation. Furthermore, wool has the ability to absorb moisture into the fibers, wicking it away from the skin to keep you feeling dry.
• 100% merino wool—tumble dry safe
While many merino wool products shrink or lose their shape when tumble-dried, Yama to Michi’s proprietary 100% merino wool offers dimensional stability that allows it to be tumble-dried at low temperatures (up to 60°C). Since you can dry it in a tumble dryer at hotels or laundromats while traveling, you can pack fewer changes of clothes for long-distance hikes and trips.
■Material：100% Merino Wool, 150-160g/m2
■Weight：
・135 g (Size XS)
・153 g (Size S)
・168g (Size M)
・183g (Size L)
・193 g (Size XL)
■Product Dimensions (cm) *From the manufacturer's website
[XS] Length: 60.5, Body width: 43.5, Hem width: 42.5, Sleeve length: 70, Cuff width: 9.5
[S] Length: 64, Body width: 48.5, Hem width: 47.5, Sleeve length: 76, Cuff width: 9.5
[M] Length: 67, Body width: 51, Hem width: 50, Sleeve length: 78.5, Cuff width: 10
[L] Length: 69, Body width: 55, Hem width: 54, Sleeve length: 81.5, Cuff width: 10.5
[XL] Length: 71, Body width: 59, Hem width: 58, Sleeve length: 84.5, Cuff width: 11
*Due to the nature of the fabric, some shrinkage or stretching may occur after washing; however, the garment has been tailored to account for this shrinkage and stretching after washing and drying.
・The figures above are for the product in its unwashed state at the time of purchase.
・Product sizes may vary by 1–2 cm.
・There may be slight variations in shrinkage rates, and these may vary depending on the type of washing machine or the cycle settings.
・Using a dryer on a low-temperature setting may cause the garment to shrink more than it would if air-dried, but this can be remedied by washing it again and hanging it to dry.
・If you notice shrinkage after washing and drying, you can fix it by stretching the fabric while ironing it with a steam iron.
■Precautions for Use
○ About dye transfer on fabric
Please note that this product may cause color transfer if it rubs against white or light-colored shirts that are wet from sweat or rain.
○ About Using the Dryer
You may use the dryer on a low-temperature cycle (maximum 60°C). However, please avoid using this setting frequently, as it can cause the fabric to pill or shed fibers. If the fabric dries while folded or wrinkled, the wrinkles will set once the garment cools. Therefore, do not use a laundry net; instead, dry the item on its own or in a machine with ample space. Remove the item promptly after drying.
*Note: Using a dryer may cause the garment to shrink by 1–2 cm in length, but this can be corrected by washing and line-drying it again.
■Product Care
・Merino wool can become prone to moth damage if body oils build up. Please wash it regularly.
・When storing the product, please use moth repellents and take measures to keep it in an airtight container to prevent insect infestation.
・Yama to Michi’s 100% merino wool fabric is resistant to shrinkage, so it can be washed in a washing machine on a gentle cycle—such as the “delicate” or “fine wash” setting—which uses a gentle water flow to wash delicate garments.
・Regular detergents remove too much of the natural oils found in wool, which can cause the dye to run and lead to color fading. When washing, please use a mild detergent designed for delicate fabrics.
・Because the fibers are short, pilling and fuzz may occur; however, as you wash the item, some of the fuzz will shed, and pilling will become less likely.
*Please note that the images shown are provided by the manufacturer, so the actual product may differ slightly in terms of specifications (such as logo placement, color, or pattern placement).
Available Payment Methods
Credit Card Payment
Convenience Store Payment
Digital Wallets and QR Code Payments
Bank Transfer
Japan Post Bank
Cancellations, Returns, and Exchanges
Before Placing Your Order
As a general rule, we do not accept returns or exchanges of merchandise for reasons related to the customer’s preferences, such as “it didn’t look like I expected” or “the size doesn’t fit.” If you have any questions or concerns, please consult with our staff first.
Please place your order after understanding and agreeing to the following points.
・Depending on the device or environment you are using, the color and texture of the product may appear slightly different.
・There may be slight variations in the dimensions listed in the product description.
・Minor scratches or scuffs may occur unavoidably during the manufacturing process.
・Depending on the material of the product, there may be variations in color, texture, or pattern from item to item.
Order Cancellation
As a general rule, we do not accept cancellations after a shipping confirmation email has been sent.
We make every effort to manage our inventory, but if we are unable to secure the items you ordered for unavoidable reasons, we may have to cancel your order.
Purchase Limit
We may impose purchase limits on certain products. Orders placed from multiple accounts believed to belong to the same person, or orders suspected of using bots, may be canceled or the quantity reduced.
*Please note that we assume no liability for any losses, damages, or other adverse consequences resulting from a cancellation.
Returns and Exchanges
While we take the utmost care to ensure the quality of our products and their packaging, in the unlikely event that an item arrives damaged or soiled, or if you receive an item that differs from your order, please contact us via the “Contact Form ” within 7 days of the delivery date. We will cover all associated costs.
・If a replacement item is available, we will replace the item.
・If we are unable to secure a replacement, we will issue a refund.
Please note that we cannot accept returns or exchanges if any of the following conditions apply. We appreciate your understanding.
・If more than 8 days have passed since the product was delivered
・When we determine that the customer has finished using the product
・If the item has been altered, washed, or dry-cleaned
・If any accessories (product tags, warranty cards, bags, boxes, etc.) are lost or damaged
・If odors, scratches, or stains occur while the item is in the customer's possession
・Items that come into direct contact with the skin, such as underwear, socks, and accessories, as well as perfumes and cosmetics, etc.
・If the item is returned without prior notice
About the Listed Prices
We take every precaution to ensure that the product information displayed on this site is accurate. However, in the unlikely event that we discover after payment has been processed that a product’s price was incorrectly displayed on the site, we will contact you and either adjust the price to the correct amount and process the payment, or cancel your order.
Important Notes
*Please note that inventory for this item is shared across our physical stores and other shopping sites operated by our company. We check inventory after receiving your order, so the item may be out of stock in some cases. We apologize for any inconvenience this may cause and will notify you via email if this occurs. Thank you for your understanding.
