The Iron Heart Lightweight N1 Deck Jacket artfully blends vintage inspiration with modern practicality. Crafted from durable Japanese sulphur-dyed whipcord, this jacket features a breathable and water-resistant cotton lining ideal for transitional seasons. With a corduroy-lined collar and adjustable hem, it offers both warmth and style. Perfect for layering, its refined details ensure a tailored fit suitable for both urban adventures and rugged outdoor activities, making it a versatile addition to any wardrobe.
From the brand: 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.
