There are three types of FSC on-product labels.
The FSC 100% label means that the wood within the product comes completely from FSC-certified forests. Research suggests one-third of all FSC-certified products are FSC 100%. (FSC Global Market Survey Report 2014)
The FSC Recycled label means all the wood or paper in the product comes from reclaimed (re-used) material.
The FSC Mix label means the wood within the product is from FSC-certified material, recycled material, or controlled wood. While not fully FSC-certified, controlled wood cannot be:
harvested in violation of traditional and civil rights;
harvested in forests where high conservation values (HCVs) are threatened;
harvested in forests being converted to plantations or non-forest use;
harvested in forests where genetically modified trees are planted.