IHSH-293-OD - 18oz Vintage Selvedge Denim CPO Shirt - Indigo Overdyed Black

The Iron Heart 18oz Overdyed CPO Shirt is a heavy-hitting version of the classic naval overshirt, built from a dense 18oz indigo selvedge denim that’s been overdyed black. It’s one of those fabrics that grabs you immediately—the overdye gives it depth and instant attitude without distressing, while setting the stage for dramatic fades. Beneath the black surface lies an indigo rope-dyed core, meaning every crease and wear pattern will reveal rich blue highlights over time. The result is a piece that evolves uniquely with each wearer, carrying the rugged, lived-in look Iron Heart has perfected.

Designed with a CPO silhouette and finished with unmistakable Iron Heart details, this version features oversized copper snaps, western yokes, chainstitch runoff, and handwarmer pockets that make it feel more like a three-season jacket than a shirt. Reinforced seams, poly-cotton thread, and selvedge construction ensure lasting durability. This one’s not just made to impress—it’s made to outlast nearly everything else in your rotation.

• 18oz Japanese indigo selvedge denim overdyed black
• 100% cotton
• Indigo rope-dyed warp, white weft
• Right-hand twill weave
• Post-construction black sulphur overdye
• CPO western shirt silhouette
• Slim fit with longer body
• Oversized Iron Heart copper snaps
• Flap chest pockets with pen slot
• Side handwarmer pockets
• Western front and back yokes
• Rounded hem with gussets and chainstitch runoff
• Single and double-needle stitching
• Poly/cotton thread for strength
• Bar tack reinforcements
• Bias-bound arm seams
• Sanforized, one-washed, and overdyed (no further shrinkage)
• Made in Japan

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

Fit Notes: Tommy wears larges in most Iron Heart outwear pieces, and this CPO fits him well in that size. This piece is like the western but with more room. So he is able to stick with a size that is closer to his "normal size." We would recommend sizing up once if you're in between sizing. Tommy is 5'10," 162lbs with a 40" chest.