Formal Marine Denim Jacket

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A jacket that commands presence... sharp in its lines, timeless in its wear.

Carry form and function in the Formal Marine Denim Jacket. Cut with military precision and crafted in denim, it balances durability with a refined finish. A jacket that works across settings — polished enough for city streets, easy enough for everyday.

100% cotton denim with structured seams

Inspired by naval formalwear, refined through denim

Clean silhouette with tailored lines for versatility

Durable construction that softens beautifully with age

$395.00 USD

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Crafted with Intention, Made to Last

Small Batches, Never Mass-Produced

Quality Checked by Us

Born in New York, Delivered Across America

Estimated delivery between October 09 and October 13. Order within .

We designed the Formal Marine Denim Jacket as a nod to naval dress jackets, blending structure and refinement with the wear-in character of denim. Crafted from 100% cotton denim, it carries the weight of durability while softening through wear, becoming more personal over time.

The cut is clean and intentional... sharp seams, structured lines, and a silhouette that elevates without feeling rigid. Whether layered over a blouse, paired with trousers, or styled casually with a tee, it adapts with confidence. This is denim reimagined: refined enough to hold its place, lived-in enough to make it yours.

80% Cotton
18% Polyester
2% Spandex

Crafted from a cotton-rich blend with subtle stretch, offering breathability, resilience, and ease of movement — making it as functional as it is stylish.

Dry clean only — recommended to maintain the jacket's shape and refined finish.

Every order leaves our studio with care, packed and shipped Monday through Friday (never on holidays, when we all slow down). Once you place your order, we’ll have it on its way within 2–5 business days.

If something isn’t quite right, we accept returns or exchanges on unworn pieces, tags still attached, within 14 days of purchase. Refunds can be made to your original payment method, or as a gift card if you’d prefer store credit.

A note on Final Sale pieces: those are treasures meant to stay with you, so they can’t be returned or exchanged.

Still unsure or need a hand? Write to us at hello@heirloomamalgam.com ... it’s Amy and Scott on the other side, and we’ll help.

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Formal Marine Denim Jacket

$395.00 USD

The finishing piece your wardrobe deserves.

The Formal Marine Jacket is a refined interpretation of naval-inspired tailoring — crafted from dark indigo stretch denim selected for both structure and longevity. The Nehru collar, oversized French cuffs, and chrome-finished metal buttons elevate its utility roots, while the cropped silhouette offers versatile styling across seasons. Designed to hold its shape and character with wear, it is a piece made to live with you — worn often, styled instinctively, and trusted for years to come.

Crafted to hold its shape — and its place in your wardrobe.

The Heirloom Edit