What are some tricks on breaking in a new carhartt coat?

If it is quilted or lined you can wash it a few times to soften up the material. You can also rub it with a hard plastic brush. If it is unlined, throw it under your car tires and drive over it a few times on a gravel road or driveway. (Seriously.)Then wash it. I used a wire brush to soften up the knees on a set of double-front Carhartt bibs.