It should be noted that hemp and cotton is not a good blend. Allow me to explain why.

The hemp is stronger and has a higher friction value that the cotton. It acts like a saw. In the knit weave where the fibres are milled together, over time, the hemp actually wears away the softer cotton fibres, causing them to break, produce lint, and over time breaks down the structure of the weave. Cotton also shrinks more with time than hemp does, so the cotton fibres are actually pulled taut over the hemp fibres, further aiding the friction process where the hemp rubs the cotton in to disintegration.