White Heavyweight Long Sleeve T-Shirt

Summer along the harbor has its own particular rhythm. The mornings start cool and the afternoons open up warm, and somewhere in between there is a window when a short sleeve is not quite enough and anything heavier is too much. The White Heavyweight Long Sleeve lives in that window. It is the piece you reach for on a morning walk along the waterfront when the air still has some cool to it, and the one you are still comfortable in when the afternoon warms up and you have not thought about what you are wearing in hours.

White is the right color for a piece like this. It is clean and open, the color of sails and hulls and the light off the harbor on a clear summer day. It is also the most honest color for a heavyweight long sleeve — it has nowhere to hide, which means the construction has to be right. And it is. The 240 GSM cotton holds its shape, the crew neck sits clean, and the embroidered Seaport logo and Authentic Gear sleeve patch are the details that make it specific without making it loud.

This is not a thin layer. At 240 GSM, it has real weight to it — the kind that gives it structure and drape that lighter shirts do not have. It wears well on its own and layers easily under a hoodie or jacket when the temperature drops. It is the piece that earns its place in your rotation by being exactly what it needs to be, in exactly the right weight, in a color that belongs along the water.

Why You’ll Keep Reaching For It

100% pre-shrunk cotton means this shirt fits the same way on the hundredth wear as it did on the first. It does not shrink, it does not stretch, and it does not lose its shape at the collar or cuffs. White requires good construction to stay looking right, and this one has it — the fabric holds its color through washing without going gray or yellow, and the embroidery stays sharp over time. It is the kind of piece that rewards being taken care of, and that takes care of you in return.

Product Details

• 100% pre-shrunk cotton
• 240 GSM heavyweight construction
• Long sleeve silhouette
• Embroidered Seaport logo
• Signature Seaport Authentic Gear sleeve patch
• Crew neck

Designed in Boston. Rooted in Boston Harbor and built for life along the water.