Featured in the Media
CORE SHIELD® has been featured as high-performance wear that targets both near-infrared and UV rays — a new option for people who are active outdoors.
*Article content and availability may change at each media outlet's discretion. Articles are in Japanese.
Golf, morning walks, life under the sun —
do you know this kind of struggle?
Endless sweat and discomfort
The toll on your body
Worries about the heat
What's really behind that struggle
It's largely caused by
Heat energy that passes through the skin and reaches deep inside
- Carries heat into the core of your body
- Builds up fatigue and accelerates skin aging
- The real source of that piercing, draining heat on your skin
Your skin may be protected,
but heat is still getting in.
They protect the skin surface, but can't block heat energy from entering the body.
They prevent sunburn on the skin surface, but can't block the heat energy that reaches deep inside the body.
Feels cool when you put it on, but doesn't stop heat from building up inside.
It may feel cool at first, but it does little to stop the heat of direct sunlight from building up inside your body.
They block direct sunlight, but not reflected heat or heat that passes through fabric.
They block direct sunlight, but not heat reflected from the ground or heat that passes through the fabric.
The CORE SHIELD® Bucket Hat uses Trubeaute®, a functional fabric made with special ceramic microparticles derived from rare metals.
View the Bucket Hat
Near-infrared and UV rays —
double protection in one layer.
CORE SHIELD® high-performance innerwear and bucket hat, built for intense heat. The lineup now protects not only your body but also your head from near-infrared and UV rays.
Innovative protective wear
Tested fabric, trusted quality
The PNX CORE SHIELD inner shirt is designed for year-round wear. Using advanced fiber technology, it helps protect your skin from both UV and near-infrared rays — keeping you comfortable under the hot sun and protected from photoaging in every season.
Near-infrared rays carry heat deep beneath the skin.
UV protection + near-infrared absorbing fibers
- Cool-touch, quick-dry fabric
- UV protection: UPF50+ (fabric test value)
- Fibers that absorb near-infrared rays
- Long sleeves and high neck cover your skin from direct sunlight
Near-infrared absorbing yarn
Made with yarn incorporating special ceramic microparticles derived from rare metals—the same heat-shielding material used in window films for buildings and cars worldwide. This material offers high near-infrared absorption.
UV-reflecting yarn
Achieves powerful UV-blocking performance by incorporating titanium oxide into the yarn.
This provides both comfort and functionality year-round, offering heat shielding and UV protection in summer, and preventing photoaging in autumn and winter.
Dry-keep structure that prevents the buildup of sweat-related discomfort.
Stays comfortable with ultra-quick drying and a cool-to-the-touch feel
- Ultra-quick drying: Dries twice as fast as standard polyester
- Contact cooling: Features moisture-wicking cooling effect
- Wash resistance: Dimensional change rate of less than 1% after washing
- Prevents sweat-related rashes and chill
- 3D stretch construction that does not restrict movement
Tests conducted according to JIS standards (JIS L 1907, drop method) confirm that it dries in approximately half the time of conventional polyester. Its ultra-quick drying function prevents sweat accumulation, significantly reducing discomfort. Furthermore, the contact cooling function has been officially certified by the third-party organization Kaken Test Center, and its excellent durability has been proven by a dimensional change rate of only -0.7% after washing.
From people who had the same concerns Real users share their experience.
Less sweat after 18 holes.
The fabric is thicker than cooling shirts, so I was skeptical, but I clearly felt the difference on summer rounds. The burning feeling on the back of my neck eased, and I sweat noticeably less after 18 holes. I can't do without it now.
Like standing in the shade of a tree.
I could feel it keeping me cooler. Unlike cool-touch fabric, the coolness lasts. Especially when cycling and feeling the breeze, I actually feel cooler wearing it — just like stepping into the shade of a tree.
Better than I expected.
It kept the sun off and I stayed comfortable even under the blazing sun. I sweat more than most people, but it absorbed the sweat so it didn't run down. I also didn't get chilled by sweat when coming into an air-conditioned room. Better than I expected.
No more “piercing” sun.
Even with sunscreen, I was getting more sunspots every year. When I learned that near-infrared rays contribute to photoaging, I decided to buy it. On my 20-minute bike commute, I no longer feel the sun piercing my arms and neck. I'm also happy that the high neck isn't uncomfortable.
Cool the moment I put it on — even in the summer fields.
I thought long sleeves for farm work were something you just had to put up with in the heat. This feels cool the moment I put it on, and even in the fields in midsummer I feel less worn out. Four stars only because I'd love a beige color option too.
“Wearable shade” for someone who dislikes air conditioning.
My son and his wife gave it to me after hearing that older people notice heat less easily. I don't like air conditioning, so it's like wearing shade. It's light and dries quickly after washing, so with two I can wear one every day. I see it as a tool for staying active for years to come.
*Excerpts and summaries of reviews from Amazon, Rakuten, Yahoo! Shopping (Japan) and customer survey cards, translated from Japanese. Individual experiences; results are not guaranteed.
For life under the sun,
find your perfect layer.
The full CORE SHIELD® lineup — everything from fabric production to sewing is done in Japan. Choose the one that fits your lifestyle.
We recommend having two inners, or pairing an inner with the hat.
Long-Sleeve Mock-Neck Inner
Our classic full-coverage piece for arms and neck. For men who want protection from both sun and heat.
V-Neck Sleeveless Inner
Our lightest layer for under a polo shirt. Sleeveless, for men who put freedom of movement first.
Long-Sleeve High-Neck Inner
Designed for women, with full coverage up to the neck. For women who want thorough sun protection.
Long-Sleeve Inner, Relaxed Fit
A relaxed fit with longer sleeves that cover the back of the hand. For those who dislike a tight fit and prefer room to move.
Bucket Hat
A full brim that shades your head down to the nape. Made with the same near-infrared-absorbing special fiber as our innerwear.
*Prices are shown in your local currency. Import duty and VAT may be charged on delivery. Ships from Japan by EMS.
Japanese craftsmanship,
from fiber to finish.
Japan is known around the world for its uncompromising standards of quality and attention to detail. CORE SHIELD® carries that tradition into every piece we make.
Every step happens in Japan. The functional material uses special ceramic microparticles derived from rare metals. The fabric is produced in Japan, and each garment is sewn and packed by skilled craftspeople in Yanagawa, Fukuoka.
Our craftspeople use high-performance sewing machines also used for swimwear, creating a comfortable fit and seams that hold up wash after wash. Already worn by golfers, outdoor workers and daily walkers across Japan, and featured in Japanese newspapers including the Nishinippon Shimbun and Mainichi Shimbun — now available in Thailand and Malaysia.
Sun & heat protection apparel brand
What is CORE SHIELD®?
CORE SHIELD® is a sun and heat protection apparel brand by Phoenix Co., Ltd. It uses Trubeaute®, a special fiber containing special ceramic microparticles derived from rare metals. The fibers absorb near-infrared (NIR) rays, and the fabric offers UPF50+ UV protection (fabric test value), with cool-touch and quick-dry performance. It supports outdoor activities such as golf, outdoor work, farming and daily walks. The lineup currently includes innerwear and hats, with more to come.
Frequently Asked Questions
Yes, they are different. Near-infrared rays are a type of light in sunlight, accounting for about 42% of solar energy (UV is about 8%). They have a longer wavelength than UV and reach deeper into the skin, and are sometimes called "aging light" because they are associated with skin aging such as wrinkles and sagging. That is why CORE SHIELD® uses fibers that absorb near-infrared rays, in addition to UPF50+ UV protection.
CORE SHIELD® uses cool-touch, quick-dry fabric with fibers that absorb near-infrared rays, the part of sunlight that carries heat. How cool you feel depends on conditions such as temperature, humidity and activity level. On hot days, please also drink plenty of water and take regular breaks in the shade.
Yes. The sleeveless model covers your torso with near-infrared absorbing fabric, while leaving your arms free so heat can escape. It is designed as a light inner layer under a polo shirt on the hottest days. If you also want UV protection for your arms, we recommend the long-sleeve models.
For those who want to focus on sun protection for their arms, we recommend the long-sleeve version, while those who tend to get hot or are looking for an inner layer to wear under a polo shirt should choose the sleeveless style. We also recommend "owning both" so you can switch between them depending on the climate and occasion.
Many customers in Japan tell us that "the sun feels less harsh" and that it was "comfortable even in direct sunlight." How it feels varies from person to person, but you are most likely to notice the difference on days with strong sunshine.
While standard sports innerwear mainly focuses on UV protection and quick-drying, CORE SHIELD® also uses a special material that absorbs near-infrared rays, the part of sunlight that carries heat.
Furthermore, it offers approximately twice the drying speed of regular polyester, quickly releasing sweat to reduce the discomfort of the innerwear becoming heavy with moisture.
Distinguishing itself from typical cooling innerwear, this undershirt delivers both superior comfort and functionality.
This product features a stretchable, form-fitting design. If you prefer a looser fit, we recommend choosing one size larger.
For those with a standard to slightly slim build: We recommend choosing your usual size.
For those with a solid or fuller build: To ensure a comfortable fit, we recommend choosing one size larger.
For those with a muscular build or more volume in the upper body due to sports, etc.: For ease of movement and comfort, we recommend wearing one size larger.
For women: When choosing a size, it is safer to use your "width (chest circumference)" rather than your height as a guide.
We accept returns and exchanges even after the package has been opened, provided the item has only been tried on. However, please note that we cannot accept returns or exchanges if the shirt is found to be soiled or damaged.
Because special inorganic components derived from rare metals are kneaded into the fibers, the effect does not diminish even with repeated washing, maintaining stable performance semi-permanently. In addition, it is resistant to wear and aging, offering high durability that withstands long-term use.
※According to tester results: After approximately 50 cycles of wearing and washing, no fraying or pilling of the threads was observed.
Yes, we use an opaque fabric, but if you are concerned about transparency, we recommend the black color.
We use skin-friendly materials, but we cannot guarantee that allergic reactions will not occur in all individuals. If you have any concerns, please consult a doctor or specialist.
Yes. UV and near-infrared rays are present all year round, and unlike UV, near-infrared rays do not drop much in the cooler months. You can wear CORE SHIELD® comfortably in every season, for sun and sweat in hot weather and for skin protection the rest of the year.
Japan is home to many excellent material manufacturers, yet most products that reach consumers today, not only clothing, are made overseas. We did not want to make something produced cheaply, used briefly and replaced every year. CORE SHIELD® is made to protect people under the sun every day, so we believe it should be carefully crafted in Japan and built to last.
We currently also offer hats (bucket hats) equipped with CoreShield. We will continue to expand our product lineup.
Trubeaute® is the name of the special fiber used in CORE SHIELD® fabric. This fiber is embedded with special ceramic microparticles derived from rare metals. The material absorbs near-infrared rays while letting visible light through, and is also used in heat-shielding materials for building windows. Because it is embedded within the fiber, the effect lasts semi-permanently even after repeated washing.
Yes. We accept bulk orders for companies, sports teams, clubs and retailers. Please contact us at info@pnxsports.com with the products, approximate quantity and timing you need, and we will send you a quote.
Forget about the sunlight and the temperature.
We create an environment where you can pour your all into your daily performance, undistracted by heat, UV rays, or near-infrared rays.
"PNX" is a high-performance sports apparel brand based on the concept of being a "second skin" that supports people in their challenges.