Cotton or bamboo jerseys are knitted instead of woven, which makes themtherefore naturally extensible. They also containoften elastic fibers such as spandex, which makes them even more stretchy. No surprise that this is a very soft fabric.pularea for making clothes!
It should be noted, however, that bamboo jersey (bamboo viscose) is thinner and much more fluid than cotton jersey. That being said, he is very appreciated for his softness.