Carhartt Men's Loose Fit Washed Duck Insulated Active Jac-3 Jacket

Why is this jacket rated for "High Warmth" conditions?

It is engineered with 80g of 3M™ Thinsulate™ featherless insulation, which mimics the warmth of down while remaining effective even when damp. This, paired with the heavyweight 12-ounce cotton duck shell, earns it a Level 3 (Warmest) rating for brutally cold weather.

Does it have features to help with daily job site wear?

Yes, it includes Cordura®-reinforced sleeve hems to prevent fraying and wear, articulated elbow pleats for easier movement, and internal rib-knit storm cuffs that seal out the cold and snow.