WEDI system - complete synthetic product. Will not rot, get mold or break down if it gets wet. Delevopled by a company in Germany. I bought two of them and thought I was going to build a steam shower. Plan did not happen. So now they are up for sale. I paid 1800.00 for both bench's. I am open to reasonable offers. I just want them sold, wife wants the storage back. lol Make me an offer