“Kapok is natural vegetable based fiber obtained from the seed capsules of trees grown in Java, Sumatra, and central America. The fiber is also known as silk cotton because of its natural luster similar to that of pure silk.
Kapok looks similar to cotton but can be ‘easily’ distinguished from it when tested under a microscope. The fiber appears like a hollow tube with very thin walls and frequent folds.” The only problem with Kapok (if your thinking of using this fabric for some of your gear), is that its highly flammable. Yet another reason to quit smoking, check it out below via New-Fabric.