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This classic design kept a generation of Americans warm, even when there was no central heat. Rated for cold temperatures, our cotton thermal union suit is made of one piece to help you beat the chill. It features a vertical rear flap, which keeps you warm while doing your business (which especially important if you are using an outhouse, which gets mighty cold in winter).
Sizing Guide
Small: Chest 34-36"
Medium: Chest 38-40"
Large: Chest 42-44"
XL: Chest 46-48"
2XL: Chest 50-52"
3XL: Chest 54-56"
4XL: Chest 58-60"
Other important sizing info: