LIFE
2026.06.12
【Workman】Effective for the back! The "X Booster Cool Half-Sleeve V-Neck" is an inner wear that offers posture support that feels more expensive than the 1500 yen price tag
Just wearing it supports the back, Workman's "X Booster Cool Half-Sleeve V-Neck." I actually tried the 1500 yen posture support inner in scenarios that require movement, like running, with my usual XXL physique.
After turning 35, I started to be concerned about my posture
Around the time I turned 35, I began to notice my posture. When I'm not careful, my back hunches over, and when I glance at my reflection in the window, I look more "worn out" than I thought. The longer I spend at my desk, the more I feel my shoulders drooping forward by the evening. I had a vague feeling that this wasn't good.
That said, it may not be necessary to go as far as to wear a full-fledged correction belt. While I was grappling with this half-hearted concern, I came across Workman's "X Booster Cool Short Sleeve V-Neck."
The price of 1500 yen is a bit high for just a single inner layer, but I was drawn in by the explanation of its patented structure that "supports posture just by wearing it," and decided to give it a try, albeit with some skepticism.
The price of 1500 yen is a bit high for just a single inner layer, but I was drawn in by the explanation of its patented structure that "supports posture just by wearing it," and decided to give it a try, albeit with some skepticism.
A fit that clings closely to the body, beyond my expectations
To be honest, choosing the right size was a bit of a struggle. I'm 180 cm tall and weigh 95 kg, and I usually wear XXL. This time I chose the largest size, 3L, but it was still quite tight. From the moment I put it on, the fabric clung tightly to my body, giving a firm sense of pressure from my shoulders to my back. At first, I was a bit anxious, thinking, "Will this really fit?"
However, since this is a compression innerwear, this fit is by design. Rather, I came to understand that this close fit enhances the posture support mentioned later as I wore it.
That said, the tightness is on the stronger side, so those who want a looser fit will likely feel constricted. If you want a little more room, it might be just right to opt for one size up.
That said, the tightness is on the stronger side, so those who want a looser fit will likely feel constricted. If you want a little more room, it might be just right to opt for one size up.
The moment I put it on, my shoulders were pulled back
What surprised me first when putting on the sleeves was the feeling that my shoulders naturally pulled back just by standing. It felt as if the support fabric positioned at the back was pulling my rounding back back into place. When I tried to slouch, the fabric gently tugged me back, saying “not that way.” Without exerting effort, I was guided naturally to open my chest. This sensation was clearer than I had imagined.
Even just moving a little felt like there was a core going through the middle of my back, giving me a sense of stability. Since the tightness is quite solid, I felt that it might be better suited for moving around rather than just sitting still.
I understood while running, the effectiveness during movement.
So, I decided to wear it while running. Once I actually started running, I could clearly feel the presence of the support fabric. The upper body doesn't wobble easily, and it's possible to naturally maintain an upright posture. Usually, by the latter half of my run, my form tends to lean forward and break down, but I was able to maintain it quite well until the end. Every time I swing my arms, I feel the area around my shoulder blades move smoothly, and it seems like I'm using my upper body more comfortably than usual.
Even after sweating, whether it's because of the mesh portions on my back and sides or not, there was no feeling of the fabric sticking heavily to my skin. At the beginning of my run, thanks to the contact-cooling effect, it felt refreshingly comfortable, and after the sweat dries, the smooth texture against my skin continues. As a piece to wear in the humid heat of the rainy season, it was more comfortable than I expected.
One simple but helpful feature is that the neckline is a V-neck. When worn under a shirt, the inner collar is not very visible, so I can wear it without hesitation for outings or a bit of shopping on holidays. When I hear "posture support innerwear," I imagine a bulky design focused on functionality, but this seems like something I could wear as innerwear. It serves multiple roles in one piece, so it looks like it will be the most frequently worn item this summer.
It has made me more conscious of my posture for 1500 yen.
The most significant change after wearing this innerwear might be that I've become more aware of my posture. While wearing it, my back is less likely to round, and my upper body stabilizes when I run. It doesn’t dramatically transform my body, but it's great that just wearing it can create a state where "I realize my back is straightening." Honestly, I initially underestimated it, thinking that for 1500 yen, the effect would be minimal, so I was pleasantly surprised.
The fit is quite snug, so preferences may vary, but those who tend to have rounded backs due to desk work or those who have a habit of moving their bodies should definitely feel its effectiveness. Next time I run, I think I'll choose to wear this without hesitation.
Product name / X Booster Cooling Half-Sleeve V-Neck
Price / 1500 yen (including tax)
Material / Main body: 80% nylon, 20% polyurethane; Separate fabric: 100% polyester; Mesh portion: 85% polyester, 15% polyurethane
Color / Black, Navy, White
Size / M, L, LL, 3L
● Workman
Interview and text / SYURI
The fit is quite snug, so preferences may vary, but those who tend to have rounded backs due to desk work or those who have a habit of moving their bodies should definitely feel its effectiveness. Next time I run, I think I'll choose to wear this without hesitation.
Product name / X Booster Cooling Half-Sleeve V-Neck
Price / 1500 yen (including tax)
Material / Main body: 80% nylon, 20% polyurethane; Separate fabric: 100% polyester; Mesh portion: 85% polyester, 15% polyurethane
Color / Black, Navy, White
Size / M, L, LL, 3L
● Workman
Interview and text / SYURI








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