Hi Laura, I realize this reply is late but hope it is still helpful. The decking is actually called Zuri decking, which can you read more about here. It's generally more expensive than Trex, but it is higher performing and is one of the best options on the market as far as replicating the look of real hardwood goes. The handrails are hardwood, and the posts are actually pressure-treated wood surrounded by white PVC trim.