
Refined for Everyday Movement.
C FLEX Merino Wool T-Shirt
Designed with a unique pattern that allows unrestricted arm movement.
A high-performance merino wool T-shirt offering natural odor control and moisture regulation—freeing you from daily stress.
Super100’s Merino Wool: Six Essential Functions
The finest material shared by all C-one T-shirts—Super100’s Merino Wool. One garment that elevates your everyday life.
Do Any of These Sound Familiar?
“Wool feels itchy on my skin.”
“Sweat makes me uncomfortable and causes odor.”
“High-quality clothes seem hard to care for.”
C-one’s Super100’s Merino Wool solves all of these concerns.
Refined Quality for Everyday Wear.
A T-shirt designed for unrestricted movement and all-day comfort. Its innovative sleeve construction allows natural arm motion, while premium merino wool ensures breathability and softness. More flexible than conventional T-shirts, it adapts seamlessly to your body’s movement—offering true freedom without compromise.
Designer’s Philosophy
A C-one T-shirt is more than just clothing. To bring comfort and refinement into everyday life, our designer’s philosophy and craftsmanship are embedded even in the details you cannot see.
01. Freedom of Movement, Without Compromise

The fabric seamlessly connects from the back shoulder to the sleeves, eliminating seams in key stress areas. This unique construction allows unrestricted arm movement, ensuring lasting comfort without any sense of constraint.
02. A Unisex Silhouette Designed for Active Life

Developed from an understanding of human anatomy, this three-dimensional pattern has been refined by expert pattern makers. Combined with highly elastic merino wool, it fits naturally to the body—providing comfort and ease of movement for both daily wear and active moments.
C FLEX Merino Wool T-Shirt: Craftsmanship in Every Detail
From material selection to sewing techniques, no compromises are made. Each wear delivers a sense of quality you can truly feel.
01. Premium Materials
The natural drape and softness of Super100’s merino wool, combined with C-one’s original pattern design, create a silhouette that never clings too tightly. Casual yet refined, it pairs effortlessly with any bottoms and elevates your overall look.
02. Expert Japanese Craftsmanship
To fully bring out the delicate characteristics of Super100’s merino wool, C-one relies on skilled Japanese artisans for knitting and sewing. The craftsmanship hidden in unseen areas ensures durability, shape retention, and long-lasting beauty—even after repeated wear and washing.
03. Honest Pricing
By working directly with trusted domestic factories—without intermediaries— we maintain strict quality control while reducing unnecessary costs. The result is premium woolwear with uncompromised comfort and construction, offered at a fair and honest price. This philosophy lies at the heart of C-one’s craftsmanship.
Staff Styling: Designed for Real Life
“How should I wear it?” Here are recommended looks for the C FLEX Merino Wool T-Shirt, styled by our team. (Please refer to height and worn size.)
Tei / Height: 168cm
Size worn: M
True-to-size fit. Exceptional freedom around the shoulders and arms.
Gina / Height: 155cm
Size worn: S
Feels like a second skin. Moves naturally with the body.
Wentz / Height: 170cm
Size worn: L
Comfortable like sportswear—ideal from workdays to active weekends.
Tei / Height: 168cm
Size worn: M
Balanced fit with unrestricted movement throughout the day.
Mina / Height: 150cm
Size worn: S
Relaxed fit that still holds its shape—lightweight and effortless.
Size Guide & Care Instructions
Size Guide
| Size | Length | Width | Sleeve Length |
|---|---|---|---|
| S | 65cm | 47cm | 44cm |
| M | 68cm | 50cm | 46cm |
| L | 71cm | 53cm | 48cm |
| LL | 74cm | 56cm | 50cm |
*Measurements are taken flat. Minor variations may occur.
We recommend comparing with a T-shirt you already own.
Care Instructions
C-one’s Super100’s merino wool is designed for easy home care. With proper maintenance, it will retain its comfort and beauty for years.