Carhartt Tonal Patch Knit Beanie

Is it warm enough for working in freezing conditions?

It is highly effective for most cold-weather conditions; however, because it is not windproof, it is best suited for general outdoor tasks rather than extreme, high-wind winter exposure where technical, wind-blocking gear might be required.

Can I wash it?

Yes, it is machine washable. This is one of the reasons it is such a favorite for site work—it is easy to clean after a long, dirty day on the job.