Sorry Z- but I think your wrong-zgur wrote:Bamboo - the reason it's popular is that:
1. Lightweight
2. Good flex properties
3. Looks cool
Get sum, Z
1. EXTREMELY STRONG, STIFF and durable unidirectional fibers. these natural properties are one of the most cost effective materials to obtain the strength to weight ratio needed to make a long lasting kitesurf board.. Bamboo is actually VERY HEAVY comparied to something like Carbon or Kevlar...
The use of natural materials is driven mainly by the costs of getting the product to market.