Extruded sawdust that is "likely" manufactured in a few locations and bagged with many different bags or labels if ya will..Some may differ per customers request, but they'll pay for that added difference..We use and like it although we can't stretch it as far as Rich does..As far as the PINE issue, PINE is a mainstay..It is what is generated in mass amounts and used in several areas,
We grow it slash it and process it..Its easy,fast growing and the commerical mainstay..Are there Better products ? Safe to assume there is,, BUT cost and availability prohibit such..Boxo bedding is a recycled cardboard and appears to be some nifty stuff but No way can I afford to bed the rodents on it..Our hognose snakes seem to enjoy it though..