IHSH-430-BRN - Slubby Heavy Flannel Check Work Overshirt - Brown

The Iron Heart 12oz Slubby Heavy Flannel delivers everything you love about their Ultra Heavy Flannels - substance, warmth, and wind resistance - but with a completely different texture and personality. Woven from irregular slub yarn cotton, the fabric has a rugged, uneven surface that gives it a more organic hand and visual depth compared to Iron Heart’s traditional smooth flannels. Despite its coarse exterior, the interior is double brushed to achieve that same soft, cozy feel Iron Heart is known for, creating a perfect balance of toughness and comfort.

Cut in their signature overshirt silhouette, this version is made for layering - roomy enough to wear over a tee or thermal, yet structured enough to hold its shape under a jacket. Finished with classic workwear details like dual chest pockets with a pen slot, chainstitched side seams, and bar-tacked reinforcements, it’s a piece that combines durability, texture, and understated design. The direct-dyed twill weave maintains its color over time, ensuring it ages beautifully while retaining its integrity season after season.

• 12oz Japanese slubby heavy flannel
• 100% slub yarn cotton
• Twill weave
• Direct cheese-dyed for long-lasting color
• Double brushed interior for warmth and softness
• Oversized work shirt fit
• Dual chest pockets with pen holder
• Button fastenings
• Straight hem with split side-seam gussets
• Chainstitched side seams and felled internal seams
• Poly/cotton thread for durability
• One-wash finish (no further shrinkage expected)
• Made in Japan

Handmade by WORKS INC. in Japan

A variance of +/-.5" is within tolerance. 

Fit Notes: Tommy is wearing an XL in this piece. He generally wears an XL in all shirting, but could easily wear a large in this piece for a more fitted look. We recommend you buy your true size in this piece and size up if you're in between sizing. Tommy is 5'10," 162lbs with a 40" chest.