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September 28, 2026 at 9:00 pm On Sale Now
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Product Description
Yamato Michi Chemical B Long-Sleeve (Unisex)
■Excerpt from the manufacturer's description
*Important Notice*
■Differences in Characteristics Based on Color
Due to differences in dye concentration, there are variations in the functional properties achieved through processing; while the fabric strength of Off White is slightly lower than that of other colors, its antimicrobial performance tends to be relatively higher.
Due to the fabric's unique mottled texture, the same color may appear to have slight variations in shade.
■ About Odor Absorption
There have been reports of people noticing odors, such as body odor, when wearing items previously worn by others. It is possible that the body odor of someone else—to which the wearer is not accustomed—adhered to the fabric, causing a particularly noticeable sensation. There have also been reports of people detecting the smell of algae after wading in rivers or streams.
In the following situations, Chemical B may not be able to fully demonstrate its antibacterial, odor-preventing, and deodorizing properties.
・When there is an excessive buildup of sebum
・When the pH of sweat is high after sweating
・If alkaline detergents or chemicals remain
・When acidic odor-causing compounds (e.g., butyric acid, isovaleric acid, etc.—so-called body odors derived from the skin’s natural bacteria) increase due to factors such as leaving wet clothes unattended
■Regarding Stitch Marks at Seam Lines
Due to the nature of the fabric, stitch marks tend to remain after sewing, and small holes from the stitches may become visible if you pull on the sewn areas. While this does not affect normal use or wear, please avoid pulling on these areas too hard.
○ Synthetic Base Layer That Doesn't Smell or Let You Get Cold
The "Chemical B" base layer series, developed in collaboration with Teijin Frontier, eliminates the problems of "chilling from sweat" and "odor"—which have traditionally been weaknesses of synthetic fiber base layers.
The fabric structure, which makes point-to-point contact with the skin, quickly wicks away sweat to prevent you from getting chilled, while the mildly acidic yarn suppresses bacteria and prevents odor. The result is a base layer that truly combines the best of synthetic fibers and merino wool.
In particular, the Chemical B Long Sleeve features a standard fit with raglan sleeves. With quick-drying properties that allow it to dry almost instantly from your body heat and odor-resistant qualities that defy expectations for a synthetic fabric, it’s sure to be a reliable companion on your travels.
・Excellent at wicking away sweat, keeping you comfortable even during prolonged, high-intensity activities
・Although it is a synthetic fiber, it offers excellent odor-preventing and odor-eliminating properties, and the effects last a long time.
・Lighter than merino wool
・Although made of a lightweight mesh fabric, it is durable and resistant to pilling
The neckline is cut wide to allow for easy ventilation and features a clean, double-stitched finish using the same fabric as the body.
The raglan sleeves allow for easy movement of the shoulders and arms.
■Material：100% Recycled Polyester, 100g/m2
■Weight
・95 g (Size XS)
・108 g (Size S)
・120g (Size M)
・127 g (Size L)
・140 g (Size XL)
■ Fabric weight: 100 g/m²
■ Burst Strength (JIS L1096A)
・365 kPa (±6%): All colors except Off-White
・295kPa：Off White
■The pressure value at which the fabric tears when a rubber membrane is placed against it and inflated
Thermal Insulation (JIS L1096A): 17.6%
■Amount of energy lost from the heat source when dough is placed on it
*The data above is based on our in-house test results (these are measured values, not guaranteed values).
*Average values for each color (individual variations exist within each color)
■Product Dimensions (cm)
[XS] Length: 63.5, Chest width: 44.5, Hem width: 43.5, Sleeve length: 71, Cuff width: 9
[S] Length: 67, Chest: 49.5, Hem: 48.5, Sleeve Length: 77, Cuff Width: 9.5
[M] Length: 70, Body Width: 52, Hem Width: 51, Sleeve Length: 79.5, Cuff Width: 10
[L] Length: 72, Body width: 56, Hem width: 55, Sleeve length: 82.5, Cuff width: 10.5
[XL] Length: 74, Body Width: 60, Hem Width: 59, Sleeve Length: 85.5, Cuff Width: 11
*From the manufacturer's website*
*Please note that actual measurements may differ from those listed due to fabric stretch, sewing tolerances, and other factors.
*Please note that the degree of shrinkage or stretching after washing may vary from item to item and may also depend on factors such as the type of washing machine and the wash cycle settings.
*Please note that since we are using manufacturer images, the actual product may differ slightly in terms of specifications (such as logo placement, color, and pattern placement).
■Excerpt from the manufacturer's description
*Important Notice*
■Differences in Characteristics Based on Color
Due to differences in dye concentration, there are variations in the functional properties achieved through processing; while the fabric strength of Off White is slightly lower than that of other colors, its antimicrobial performance tends to be relatively higher.
Due to the fabric's unique mottled texture, the same color may appear to have slight variations in shade.
■ About Odor Absorption
There have been reports of people noticing odors, such as body odor, when wearing items previously worn by others. It is possible that the body odor of someone else—to which the wearer is not accustomed—adhered to the fabric, causing a particularly noticeable sensation. There have also been reports of people detecting the smell of algae after wading in rivers or streams.
In the following situations, Chemical B may not be able to fully demonstrate its antibacterial, odor-preventing, and deodorizing properties.
・When there is an excessive buildup of sebum
・When the pH of sweat is high after sweating
・If alkaline detergents or chemicals remain
・When acidic odor-causing compounds (e.g., butyric acid, isovaleric acid, etc.—so-called body odors derived from the skin’s natural bacteria) increase due to factors such as leaving wet clothes unattended
■Regarding Stitch Marks at Seam Lines
Due to the nature of the fabric, stitch marks tend to remain after sewing, and small holes from the stitches may become visible if you pull on the sewn areas. While this does not affect normal use or wear, please avoid pulling on these areas too hard.
○ Synthetic Base Layer That Doesn't Smell or Let You Get Cold
The "Chemical B" base layer series, developed in collaboration with Teijin Frontier, eliminates the problems of "chilling from sweat" and "odor"—which have traditionally been weaknesses of synthetic fiber base layers.
The fabric structure, which makes point-to-point contact with the skin, quickly wicks away sweat to prevent you from getting chilled, while the mildly acidic yarn suppresses bacteria and prevents odor. The result is a base layer that truly combines the best of synthetic fibers and merino wool.
In particular, the Chemical B Long Sleeve features a standard fit with raglan sleeves. With quick-drying properties that allow it to dry almost instantly from your body heat and odor-resistant qualities that defy expectations for a synthetic fabric, it’s sure to be a reliable companion on your travels.
・Excellent at wicking away sweat, keeping you comfortable even during prolonged, high-intensity activities
・Although it is a synthetic fiber, it offers excellent odor-preventing and odor-eliminating properties, and the effects last a long time.
・Lighter than merino wool
・Although made of a lightweight mesh fabric, it is durable and resistant to pilling
The neckline is cut wide to allow for easy ventilation and features a clean, double-stitched finish using the same fabric as the body.
The raglan sleeves allow for easy movement of the shoulders and arms.
■Material：100% Recycled Polyester, 100g/m2
■Weight
・95 g (Size XS)
・108 g (Size S)
・120g (Size M)
・127 g (Size L)
・140 g (Size XL)
■ Fabric weight: 100 g/m²
■ Burst Strength (JIS L1096A)
・365 kPa (±6%): All colors except Off-White
・295kPa：Off White
■The pressure value at which the fabric tears when a rubber membrane is placed against it and inflated
Thermal Insulation (JIS L1096A): 17.6%
■Amount of energy lost from the heat source when dough is placed on it
*The data above is based on our in-house test results (these are measured values, not guaranteed values).
*Average values for each color (individual variations exist within each color)
■Product Dimensions (cm)
[XS] Length: 63.5, Chest width: 44.5, Hem width: 43.5, Sleeve length: 71, Cuff width: 9
[S] Length: 67, Chest: 49.5, Hem: 48.5, Sleeve Length: 77, Cuff Width: 9.5
[M] Length: 70, Body Width: 52, Hem Width: 51, Sleeve Length: 79.5, Cuff Width: 10
[L] Length: 72, Body width: 56, Hem width: 55, Sleeve length: 82.5, Cuff width: 10.5
[XL] Length: 74, Body Width: 60, Hem Width: 59, Sleeve Length: 85.5, Cuff Width: 11
*From the manufacturer's website*
*Please note that actual measurements may differ from those listed due to fabric stretch, sewing tolerances, and other factors.
*Please note that the degree of shrinkage or stretching after washing may vary from item to item and may also depend on factors such as the type of washing machine and the wash cycle settings.
*Please note that since we are using manufacturer images, the actual product may differ slightly in terms of specifications (such as logo placement, color, and pattern placement).
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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 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 Limits
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 or responsibility 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 a product arrives damaged or soiled, or if you receive an item different from what you ordered, 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 the product 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 there is a possibility that the item may be out of stock. In such cases, we apologize for the inconvenience and will notify you via email. Thank you for your understanding.
