Carhartt Men's Relaxed Fit Bootcut Rugged Flex Jean

What exactly is "Rugged Flex" denim?

It is a high-performance, stretch-enhanced denim fabric that allows for a greater range of motion, making it significantly easier to bend, kneel, and squat on a job site compared to traditional, rigid denim.

Is this still a heavy-duty work jean?

Yes, despite the added stretch, it is constructed from 12.5-ounce abrasion-resistant denim. It is engineered to retain its shape and withstand the daily wear and tear that would quickly shred a standard pair of fashion jeans.