This looks like a nice company – they explain the various eco-friendly textiles.
The hemp plant doesn’t have any drug in it. Hemp and bamboo are in the grass family and therefore they grow fast.
According to Wikipedia, hemp is the term for the cannibis plant that is high growing and is used for fiber, oil and seed. It is refined into hemp seed foods, hemp oil, wax, resin, rope, cloth, pulp, paper and fuel.
The other variant of the herb cannibis is low-growing and contains several different drug elements.