Core Shield Men's Long-Sleeve Inner Layer, Loose Fit, Covers Back of Hands | Over 76% Near-Infrared Cut, UPF50+
- 10% OFF on purchases of 2 or more items [Official Store Exclusive]
- Free COD fee
- Free nationwide shipping
公式ストアのみ代金引換がご利用できます。
サイズ・カラーを選択してからカートに追加してください。
%20will%20be%20collected%20by%20Thailand%20Post%20on%20delivery.%20Malaysi...){kind=link}
⚠ Import duties for international orders: Prices do not include import duty or VAT. Thailand: approx. 1,090 THB (about 46% of the item price) will be collected by Thailand Post on delivery. Malaysia: orders under RM500 are exempt. Ships from Japan by EMS (3–7 days). International orders are final sale (no returns or exchanges). See shipping policy.
Next shipment is scheduled for 2027 or later
Once current stock is depleted, this item will be unavailable until the next production run. Please check size and color availability early.
What sunscreen protects against is
only about 5% of sunlight.
The remaining approximately 42% is near-infrared radiation. CORE SHIELD® uses Trubeaute®, a functional fiber that simultaneously blocks both near-infrared rays and ultraviolet rays found in sunlight. It features long sleeves that reach the back of the hands and a relaxed fit that reduces constriction. This single layer covers you from the back of the neck and back down to the back of your hands, without the need for reapplication.
Choose the style that suits you
CORE SHIELD® men's long-sleeve innerwear is available in two different styles with the same functionality. The fabric, material, and sun-protection properties are identical. The difference lies in the "fit" and "sleeve length." This is the "relaxed fit" type, designed for comfort and coverage reaching the backs of the hands.
| Category | Relaxed Fit (This product) | Trim Fit |
|---|---|---|
| Fit | Soft fit with minimal constriction | Trim fit that naturally follows the body |
| Sleeve Length | Extra length reaching the backs of the hands | Standard length to the wrists |
| Sizes | S–2XL (approx. height 162–188cm) | S–XL (approx. height 157–178cm) |
| Best for | Those who want a relaxed fit / hand coverage | Those who want a trim fit / to minimize excess fabric |
※Sun-protection functions (UV protection, near-infrared protection, moisture-wicking/quick-drying, and cool-touch) are the same for both types. The Relaxed Fit is popular for gardening or daily errands, while the Trim Fit is favored for golf or outdoor work requiring active movement.
Designed for active men and the areas you want to protect
"The back of my neck gets burned," "My back shows when I bend over," "The fabric bunches up around my shoulders during swings or work," "It feels tiring after wearing it for a long time." CORE SHIELD men's innerwear addresses these real outdoor discomforts, aiming to block the sun while allowing for natural, unrestricted movement.
Mock neck raised at the back to cover the nape
In golf addressing postures or outdoor work, the back of the neck is continuously exposed to sunlight. The mock neck, which is higher at the back, protects the area most prone to sunburn.
Longer hem prevents it from coming untucked
The long length ensures your back doesn't show when you bend over. It stays tucked in, reducing distractions during play or work.
Sewing pattern designed for shoulder and arm range of motion
Considers movement from the armpits to the arms to prevent tension during swings, practice, or raising your arms, allowing for easy shoulder movement.
Extra-long sleeves and 3D design for hand coverage
The sleeves are extra-long to naturally cover the backs of the hands, which are prone to sunburn outdoors. The 3D sleeve design follows the bending, stretching, and twisting of your arms to minimize discomfort.
Gentle fit for long-lasting comfort
Reduced-constriction design minimizes pressure on the body. It provides a comfortable fit for a wide range of body types, even during long outdoor activities.
Sunscreen only addresses about 5% of sunlight
Of the solar energy that reaches the Earth's surface, UV rays account for about 5%. The remaining 42% is near-infrared radiation. Near-infrared rays have longer wavelengths than UV rays and are noted for reaching deep into the skin.
SPF, PA, and UPF are all indicators of UV protection. There is no standard for evaluating infrared rays. Those who spend long hours in the sun need protection against near-infrared rays in addition to UV rays.
※Based on the reference solar spectrum (AM1.5 global irradiance/surface) according to ASTM G173-03. Values may not sum to 100% due to rounding.
Trubeaute®: Functional fiber that protects your skin and body
Trubeaute® is a functional material that combines yarns infused with CWO®, which absorbs near-infrared rays, and yarns infused with titanium oxide, which reflects UV rays. Since the functional components are incorporated into the fiber itself, the performance does not degrade even after repeated washing.
- Near-infrared-absorbing yarn: Infused with CWO® ceramic microparticles developed by Sumitomo Metal Mining Co., Ltd., which are also used in heat-shielding films for buildings and car windows.
- UV-reflecting yarn: Combined with yarns infused with titanium oxide to block over 99% of UV rays (tested on fabric alone).
- Fiber-integrated technology: Because the functional components are inside the fiber, they won't wash off with sweat, and no reapplication is necessary.
※CWO® is a ceramic microparticle material made from rare metals, developed by Sumitomo Metal Mining Co., Ltd.
Why it's chosen by those who spend time in the sun
Blocks over 76% of near-infrared rays
Accounting for about 42% of sunlight reaching the Earth, near-infrared light has a longer wavelength than UV rays and is noted for reaching deep into the skin. This fabric blocks the spectrum that sunscreens and standard UPF-rated clothing do not cover (tested on fabric alone).
Over 99% UV protection, UPF 50+
Blocks over 99% of harmful UV rays. Protects your skin during golf, running, fishing, outdoor work, and other activities involving long-term sun exposure (tested on fabric alone).
Moisture-wicking and quick-drying, stays off your skin
Approximately twice the drying speed of standard polyester. It stays light even when you sweat, reducing stickiness and cling.
Cool-touch technology for immediate comfort
A cool-to-the-touch feel that's delightful in hot weather. It stays comfortable and dry-feeling even during sweaty seasons, even when layered.
Recommended for
Golf, Running, Fishing
A round of golf lasts about 4–5 hours, and there's almost no shade on the course. Perfect for those who want to focus on their game or hobby without worrying about the sun.
Outdoor work, Gardening, Daily Errands
Great for long hours of outdoor work, driving, walking, or gardening. The go-to layer for those who spend long periods under the sun.
Made in Japan | Quality you can trust for your skin
Since this innerwear touches your skin directly, we do not compromise on quality. This is a purely domestic product, with fabric production, sewing, and packaging all done within Japan. We use high-performance sewing machines similar to those used for swimwear, ensuring a focus on mobility, comfort, and durability.
Product Specifications
Size Chart & How to Choose
Actual Product Dimensions & Height Reference
Unit: cm. ※Height references are approximate.
| Size | Height (Men's) | Length | Width | Sleeve (from center) | Sleeve Width |
|---|---|---|---|---|---|
| S | 162–168 | 67.0 | 44.5 | 79.0 | 18.0 |
| M | 167–173 | 69.0 | 46.5 | 82.0 | 19.0 |
| L | 172–178 | 71.0 | 48.5 | 84.0 | 20.0 |
| XL | 177–183 | 73.0 | 50.5 | 86.5 | 21.0 |
| 2XL | 182–188 | 75.0 | 52.5 | 88.5 | 22.0 |
- Standard to Slim Build: Please choose based on your usual size.
- Broad or Muscular Build: Consider going one size up for better mobility around the arms and chest. Please note this may make the sleeves feel slightly longer.
- Long-duration wear (Golf/Outdoor work): If you are concerned about feeling constricted, choosing a slightly looser size is recommended for added peace of mind.
Precautions for Use
- This product is not medical equipment.
- This product is clothing intended to reduce the burden of sunlight on the skin and body; it does not completely prevent heatstroke, all forms of sunburn, or skin irritation.
- This product is clothing and is not intended to prevent or improve dark spots, wrinkles, or skin sagging.
- Research on the relationship between near-infrared radiation and photoaging (wrinkles/sagging) is ongoing and has not reached a definitive conclusion.
- Near-infrared blocking (over 76%) and UV blocking (over 99%, UPF 50+) are test results conducted on the fabric by a third-party testing agency.
- When active under the blazing sun, please take appropriate heat-countermeasure steps in addition to wearing this product, such as frequent hydration, resting, and wearing a hat.
- Avoid using a tumble dryer.
- If you feel any irritation or the product does not suit your skin, discontinue use.
- Do not use or store near open flames.
- Avoid storage in hot, humid locations or in direct sunlight.
- Do not wear while sleeping.
Choose options