・シェル：　コットンコードクロス
・ライニング：　ウールメルトン
・リブ：　ウールリブ
・フロントファスナー：　40sベル型、ニッケルメッキ、コットンテープ
・縫製糸：　カタン糸（綿糸）

First introduced around 1941, the U.S.N. BLUE DECK JACKET was part of a specialized naval uniform officially known as Jacket, Special Winter Clothing. Though its purpose was broadly defined in regulations, it soon found a niche role aboard ships. This earned it the modern nickname, the Deck Zip Jacket, used by collectors and historians.

Originally authorized for use by non-commissioned officers, the jacket’s unembellished and practical design made it versatile enough for a wide range of tasks. It was not limited to deck work alone. Unlike the later N-1 jacket, this early version had no official designation or model number.

What sets this jacket apart historically is its transitional role. It laid the groundwork for what would eventually become the N-1 Deck Jacket. Its successor, often referred to as the Deck Hook Jacket, replaced the zipper with a hook-front closure. This design change is a key detail that helps differentiate the two.

One notable distinction lies in the lining material. According to Navy uniform standards, this jacket used wool flannel rather than alpaca wool. Alpaca was more commonly found in garments issued to aviators and ground crews. The presence of alpaca-lined variants suggests there may have been some crossover in use.

The U.S.N. BLUE DECK JACKET is constructed with a durable dark navy cord cloth exterior and fully lined with matching wool melton. It features wool ribbing for added insulation, a 1940s-style bell-shaped nickel front zipper with cotton tape, a concealed zip-front closure, and two side pockets.

• 100% Cotton Cord Cloth
• 100% Wool Melton Lining
• Wool Ribbing
• 40s Bell-Shaped Front Zipper, Nickel, Cotton Tape
• Cotton Sewing Thread Construction
• Made in Japan