NWT Carhartt Flame Resistant Insulated Duck Coveralls for Big and Tall Men. The item "NWT Mens CARHARTT Flame-Resistant INSULATED Duck Coveralls (Size 4XL)" is in sale since Tuesday, January 09, 2018. This item is in the category "Clothing, Shoes & Accessories\Uniforms & Work Clothing\Coveralls & Jumpsuits". The seller is "mcmillanberry" and is located in Enigma, Georgia. This item can be shipped to United States.