The FN-THLH-004 Henley Thermal from The Flat Head is a high-quality long-sleeve with classic workwear character and uncompromising Japanese craftsmanship. Made from 100% cotton and the brand's signature waffle-knit structure, this thermal shirt combines functionality, comfort, and authentic heritage style.

The specially developed waffle knit (thermal knit) is based on a vertical, slightly open mesh structure. This ensures high breathability, strong moisture absorption, and optimal thermal regulation, as air is stored in the interstices. This makes the shirt perfect as a base layer in winter or worn solo during transitional periods.

The material is pleasantly soft on the skin, yet robust and durable. Thanks to natural cotton, the wearing comfort remains dry and comfortable even with prolonged use.

Typical for The Flat Head is the elaborate craftsmanship:
The iconic 3-needle / 1-thread-off seam on the collar ensures exceptional shape retention and prevents stretching even after frequent wear. In addition, flat-seam stitching (4-needle) is used, which lies flat and offers maximum comfort – ideal for a garment worn directly on the skin.

The classic Henley neckline with Urea Cat’s Eye Buttons gives the shirt an authentic vintage look and makes it versatile to combine – whether as a layer under flannel, a denim jacket, or worn solo.

Details

• 100% Cotton
• Original Flat Head Waffle Knit (Thermal)
• Vertical Mesh Structure for Breathability & Stretch
• 3-Needle / 1-Thread-Off Collar Construction
• 4-Needle Flat Seam Construction
• Henley Neck with Cat’s Eye Buttons
• One-Wash (minimal shrinkage)
• Made in Japan

Fit & Note

Close-fitting, rather slim fit
Due to high elasticity, the material adapts well
For more length or a relaxed fit, one size up is recommended

Character & Use

The FN-THLH-004 Thermal is a true all-round essential for autumn and winter. Whether as a functional layer or as a stand-alone long-sleeve – this shirt impresses with comfort, durability, and an authentic vintage look.