A piggyback label is essentially a label within a label or a label on top of another label. A conventional, non-piggyback label typically ships on a liner coated with silicone to allow the face stock and adhesive to release easily. A piggyback label, on the other hand, has two liners. Once you remove the label from the bottom layer (the first liner) and apply it to a surface, the face stock becomes a liner for another label. You can then peel off that top layer and apply it to another surface while leaving the bottom label in place. It should be clear now how piggyback labels get their name. The top label rides piggyback on the bottom label. (And until application, they both ride together on the same liner.) Common piggyback label types include nested labels — in which the top label and bottom label are different in size — and flush cut labels, where both layers have the same dimensions.