When work doesn't take a snow day, the Carhartt Loose Fit Firm Duck Insulated Bib Overall is built to handle the challenge. Earning a Level 4 Extreme Warmth Rating, these bibs are engineered for the coldest conditions on earth—functioning even where thermometers quit. Constructed from heavy 12-ounce ringspun cotton duck and packed with Arctic-weight insulation, they offer Carhartt’s highest level of protection against record-low temperatures. With Cordura®-reinforced kick panels and triple-stitched seams, these bibs are as durable as they are warm.