Core Shield Women's Long-Sleeve High-Neck Base Layer, UPF 50+, Near-Infrared Absorbing Fabric, All-Season, HNPISL26
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Japan's summer hit — 4,000+ sold. Sold on Rakuten, Amazon Japan & Yahoo! Shopping.
⚠ Import duties for international orders: Prices do not include import duty or VAT. Thailand: approx. 1,130 THB (about 46% of the item price) will be collected by Thailand Post on delivery. Malaysia: orders under RM500 are exempt. Australia & New Zealand: no import duty or GST on orders under A$1,000 / NZ$1,000. Ships from Japan by EMS (3–8 days). No returns for change of mind; faulty items replaced or refunded. See shipping policy.
The next restock is scheduled for 2027 or later.
If current stock runs out, the item will be unavailable until the next production run. Please check your size and color preferences soon.
What sunscreen blocks is only
about 5% of sunlight.
Near-infrared rays account for about 42% of the rest. CORE SHIELD® uses Trubeaute®, a functional fiber that absorbs near-infrared rays while also offering UPF50+ UV protection found in sunlight. Furthermore, for the women's model, we have thoughtfully designed the neck, wrists, back, and chest areas to cover the spots adult women are truly concerned about, creating a garment that eliminates the need for reapplication.
A specialized design that answers a woman's "I want to protect this"
Common issues with women's innerwear cannot be solved by functionality alone. "Gaps at the neck and wrists get sunburned," "It's tight around the chest," or "It's too short, leaving my back or stomach exposed when I move." CORE SHIELD women's innerwear addresses the real anxieties of adult women, aiming to block the sun and ensure a beautiful, secure fit at the same time.
Extended collar covers the neck and décolleté
Thoroughly covers gaps at the neck often created when layering polo shirts or V-necks. Elegantly covers the neck area, which is easily exposed to the sun and difficult to hide.
Extended sleeves prevent accidental wrist sunburn
Designed to keep wrists covered even when reaching out, such as during golf or tennis swings, driving, or cycling. Prevents tan lines that often form between gloves or watches, allowing you to enjoy your time outdoors with peace of mind.
Elegant silhouette with room around the chest
Added appropriate room around the chest to reduce the feeling of constriction and bust line emphasis common in tight innerwear. Looks elegant even when worn alone and provides a comfortable fit that makes it easy to breathe, even during long hours of wear.
Longer hem prevents the back from showing when bending
A long cut that prevents your back and waist from showing during movements such as putting, receiving, gardening, or lifting items. It stays tucked in securely, providing a sense of comfort as if you are wrapped in it.
Side slits for a clean, beautiful waistline
Side slits are placed so the fabric does not catch around the waist or hips, even with the longer hem. Reduces tightness or flipping during movement, creating a silhouette that looks natural whether tucked in or out.
Sunscreen only addresses about 5% of sunlight
Of the sunlight energy that reaches the earth's surface, UV rays account for about 5%. Near-infrared rays account for about 42% of the rest. Near-infrared rays have a longer wavelength than UV rays and are said to reach deep into the skin.
SPF, PA, and UPF are all indices for UV rays. There are no items that evaluate infrared rays. Those who spend long hours in the sun need protection not just against UV rays, but also against near-infrared rays.
*Values integrated by wavelength range based on the ASTM G173-03 standard solar spectrum (AM1.5 global tilt/surface). Totals do not equal 100% due to rounding.
Functional fiber Trubeaute® to protect your skin
Trubeaute® is a functional material that combines threads infused with special ceramic microparticles, which absorb near-infrared rays, and threads infused with titanium oxide, which reflects UV rays.
For adult women, sun care isn't just about UV protection. In addition to the UV rays addressed by sunscreen and UPF-rated clothing, it also responds to the near-infrared rays outside that range. It covers your skin effectively during outdoor sports and daily outings.
- Threads that absorb near-infrared rays: Infused with special ceramic microparticles derived from rare metals, which are also used in heat-shielding films for building and car windows.
- Threads that reflect UV rays: Combined with titanium oxide-infused threads for UPF 50+ UV protection (tested on fabric alone).
- Infused into fibers: Because the functional components are inside the fibers, they won't wash off with sweat, and there is no need for reapplication.
Why it is chosen by those who spend time in the sun
Fibers that absorb near-infrared rays
These rays account for about 42% of sunlight reaching the surface and have a longer wavelength than UV rays, reaching deep into the skin. The fabric itself blocks the range that sunscreen and UPF-rated clothing do not cover (tested on fabric alone).
Helps protect against UV rays / UPF 50+
Helps protect against UV rays, which are a concern for skin health. Protects your skin during long periods of sun exposure like golf, tennis, walking, gardening, and driving (tested on fabric alone).
Wicks sweat quickly and resists clinging
Approx. 2x faster drying performance compared to standard polyester materials. It doesn't get heavy even when you sweat, reducing stickiness and clinging.
Contact cooling for instant comfort
Features a cool-to-the-touch sensation, perfect for wear in hot seasons. Stays comfortable even when layered and remains easy to wear during sweaty seasons.
Performance remains through repeated washing
Because the functional components are infused into the fibers themselves, performance is resistant to degradation through repeated washing or friction. It is also resistant to pilling, allowing for long-term, reliable use.
Recommended for women like these
For golf, tennis, and running
Covers wrists, neck, and back even during swinging or racket motions. Recommended for those who want to focus on their game without worrying too much about sunburn.
For walking, gardening, and daily life
For everyday sun care, such as neighborhood outings, driving, cycling, and yard work. Blends naturally even when worn under a shirt.
A high-performance innerwear for women suited for those who "never want to get a sunburn," "want to prevent accidental sunburn on the neck and wrists," or "spend long hours under the sun."
Made in Japan | Because it touches your skin, we insist on quality
Because this innerwear touches your skin directly, we do not compromise on quality. The "CORE SHIELD Women's Long Sleeve High-Neck Inner" is a pure Japanese-made product, with everything from fabric production to sewing and packaging carried out within Japan.
Sewing is done using high-performance machines also used for items like swimwear. We prioritize ease of movement, skin-friendliness, and durability, finishing it as a garment that is easy to use for sports and daily life alike.
Product Specifications
Size Chart
Actual Product Dimensions
Unit: cm
| Size | Length | Body Width | Hem Width | Sleeve Length |
|---|---|---|---|---|
| S | 60.0 | 41.0 | 40.0 | 70.0 |
| M | 62.0 | 43.0 | 42.0 | 72.0 |
| L | 64.0 | 45.0 | 44.0 | 74.0 |
| XL | 66.0 | 48.0 | 47.0 | 76.0 |
JASPO Size Reference
Unit: cm
| Size | Height | Bust | Waist |
|---|---|---|---|
| S | 152-158 | 77-83 | 58-64 |
| M | 157-163 | 80-86 | 61-67 |
| L | 162-168 | 83-89 | 64-70 |
| XL | 167-173 | 86-92 | 67-73 |
*Actual product measurements are guidelines taken while laid flat. Slight variations may occur due to production timing or individual product differences.
Sizing Guide
- For a standard fit: Use your usual clothing size as a reference.
- If you want more room around the chest: Prioritize comfort in the bust area and consider going one size up.
- For layering or daily use: If you prefer to avoid feeling restricted, a slightly roomier size is recommended.
- If you are unsure: You can feel confident by choosing based on body width and chest measurements in addition to height.
Precautions for Use
- This product is not medical-grade.
- This product is clothing intended to reduce the burden of sunlight on the skin; it does not completely prevent all sunburn or skin troubles.
- This product is clothing and does not prevent or improve spots, wrinkles, or sagging.
- The relationship between near-infrared rays and photoaging (wrinkles/sagging) is still being researched and is not a settled conclusion.
- UPF 50+ is a test result conducted on the fabric by a third-party testing agency. Test data on near-infrared rays is currently being measured.
- Please refrain from using a tumble dryer.
- If you experience any skin abnormalities during wear, or if it does not agree with your skin, please stop using it.
- Do not use or store near fire.
- Avoid storing in high temperature, high humidity, or in direct sunlight.
- Please refrain from wearing while sleeping.
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