Cali Bamboo: The World's Hardest Floors™ Not all bamboo flooring is created equal. Cali Bamboo flooring is crafted using a proprietary Fossilized® manufacturing process making it twice the density of any other hardwood floor in the world. That's why Cali Bamboo hardwood flooring is backed by a 50-year warranty. It's made to last. Cali Bamboo hardwood flooring is ultra-low VOC, and manufactured from organically-grown moso bamboo. Cali Bamboo's approach provides the perfect union of sustainability and durability to last a lifetime, making it the preferred choice of contractors, builders, and DIY homeowners.