The WaterRower Natural is hand crafted in solid Ash and stained Honey Oak for consistency of color. Each rowing machine has been hand finished with Danish Oil giving a deep lustre and warmth to the wood. Wood has been chosen due to its marvellous engineering properties, primary amongst these is its ability to absorb sound and vibration enhancing the WaterRower's smooth and quiet operation. Ash, like all woods used in WaterRower construction, is a premium hardwood with incredible longevity and dimensional stability. For reasons of ecology, all of our woods are harvested from replenishable forests.