Bamboo is amazingly strong with a very high tensile strength (nearly that of steel) and is considered the most durable hardwood.
Bamboo is the fastest growing plant on the planet with varieties growing nearly a meter per day, renewing itself readily unlike hardwood trees. It stabilizes top soil with it's root system and absorbs greenhouse gasses, releasing 35% more oxygen than an equivalent stand of trees.
Bamboo is beautiful. This impressive material is now being use for flooring, furniture, and these banner stands. Bamboo is a gorgeous replacement for traditional soft and hardwoods and can be engineered for many purposes.
Bamboo is endlessly renewable with new shoots developing from it's root system, not even requiring replanting. Bamboo can be selectively harvested annually reaching maturity in 3-5 years, as opposed to softwoods which take 10-20 years, and hardwoods which take far longer.
The bamboo variety we use is not part of the Giant Panda's diet, and is an agro-forestry product designed for industrial use.