The Montauk Shirt Jacket is a timeless staple that seamlessly blends the structure of classic outerwear with the ease and comfort of thoughtfully sourced materials. Crafted from breathable, organic cotton with a hint of stretch, it offers flexibility and comfort while maintaining a clean, tailored look. Inspired by heritage designs, this medium-weight layer features a traditional shirt-jacket silhouette that’s both stylish and practical for transitional weather. What truly sets the Montauk apart is its fully lined interior made from our signature Seaside Flannel—an ultra-soft, stretchy fabric that adds an extra layer of warmth without compromising on breathability. Whether you're layering it over a t-shirt or under a heavier coat, it provides cozy comfort you’ll want to reach for again and again. Functional design details include chest flap pockets for a rugged touch, discreet welt pockets at the waist for everyday convenience, and classic button cuffs for a refined finish. Whether you're heading into town or escaping to the coast, the Montauk Shirt Jacket delivers versatility, warmth, and elevated style, all while supporting sustainable fashion choices.