IHM-48-BLK - 12oz Whipcord Lightweight N1 Deck Jacket - Black

The Iron Heart Lightweight N1 Deck Jacket reimagines one of the brand’s most iconic silhouettes with a focus on versatility and all-season wear. Inspired by the U.S. Navy deck jackets of the 1940s, this version retains the classic N1 shape but swaps the heavy wool insulation for a lighter, water-resistant Japanese Ventile cotton lining. The result is a jacket that provides warmth, wind protection, and breathability without the bulk of its cold-weather counterparts - perfect for transitional seasons.

The outer shell is cut from a tough 12oz Japanese whipcord woven with hard-twisted yarns for exceptional durability. Unlike the traditional reactive-dyed whipcord used in Iron Heart’s standard N1, this version is sulphur-dyed, meaning the fabric will gradually fade and develop character with wear and washing. The corduroy-lined collar, cuffs, and pockets add texture and warmth, while the two-way YKK zipper, paracord-adjustable hem, and button cinches at the cuffs ensure a tailored, functional fit. Every stitch and detail speaks to Iron Heart’s craftsmanship - durable, precise, and built to age beautifully.

• 12oz Japanese sulphur-dyed whipcord
• 100% cotton shell
• Water-resistant 6.2oz Japanese Ventile cotton lining
• 14-wale corduroy-lined collar, cuffs, and pockets (85% cotton / 15% polyester)
• Two-way YKK zipper with snap-fastening placket
• D-stitch handwarmer pockets with snap closures
• Internal snap “gun” pocket
• Adjustable button cinches at hem and cuffs
• Paracord drawstring at hem
• Poly/cotton thread for added strength
• One-wash finish (no further shrinkage expected)
• Made in Japan

Handmade by WORKS INC. in Japan

Size	Shoulders	Length	Chest (P2P)	Waist	Opening	Sleeve	Sleeve Opening
XS	16.8	25.1	22.1	21.1	20.5	23.6	4.7
S	17.1	25.1	22.4	21.5	21.0	23.8	4.8
M	18.0	25.8	23.1	22.3	21.9	24.1	4.8
L	19.0	26.5	24.1	23.1	22.7	24.9	4.9
XL	19.6	27.4	24.6	23.6	23.3	25.4	5.0
XXL	20.4	28.1	25.5	24.6	24.1	25.9	5.1
XXXL	21.1	28.9	26.3	25.3	24.8	26.5	5.2
XXXXL	22.1	29.8	27.1	26.0	25.1	27.3	5.2

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

Fit Notes: Tommy is wearing an L in this piece. He generally wears this size in their jackets and XLs in all the shirting. This one sticks to that standard. It has a roomier cut, as a jacket should, which allows him to wear a size closer to his "normal size." We would still recommend sizing up once if you are in between sizes. Tommy is 5'10," 162lbs with a 40" chest.