There are about 90 genera of Bamboo and over 1,500 different species. The size of bamboo varies from small annual plants to gigantic timber bamboo shoots. Bamboo evolved somewhere between 30 to 40 million years ago just after the demise of dinosaurs. Bamboo is one of the fastest-growing woody plants in the world with many species growing to full size and ready to harvest in just under four years. The tensile strength of plated bamboo cables is ever bit as strong as or stronger than a steel cable of the same size. While hemp rope can loose up to 20% - 25% of its strength when wet, bamboo cables actually increase in strength by as much as 20% when wet. So in closing, if you get a little perspiration on the back of your new Bamboo Watch - don't worry about it, it can only make it stronger.