Proof 72-Hour Merino Tee—Every Guy Needs a Solid Black T-Shirt

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Proof's bestselling 72-Hour collection is crafted from a New Zealand merino wool that’s infused with nylon to ensure it never shrinks in the washing machine. As the ultimate travel t-shirt in their arsenal, it functions just as well as a merino wool base layer for adventures that call for packing light and staying comfortable. Even after 72+ hours of constant wear, it’ll still pass the smell test thanks to the naturally odor-resistant and moisture-wicking properties of merino wool.