When we choose fabrics in our daily wear, we often can't distinguish linen and hemp, I don't know what the difference is between the two, in fact, "hemp" is a general term for fibers made by plants, and flax is also a kind of hemp.
In general, there are many types of hemp, and flax is only one of the categories, and the more common hemp materials in clothing are flax and ramie. In addition, the toibis that is often used in sandals is also a type of hemp.