I looked it up. Basic material simply means "cheap" Chinese white birch. Its not a quality hardwood at all, which explainns the "mid line" tag. This means nothing to me, as long as the drums sound ok, but i wish they would be more up front with the description. After all, the shell starts with the wood. Maybe we should assume this because of the price point, but if Sonor was embarrased to mention that fact, it makes me wonder why?