White polyethylene with opaque lining. Side edges are sealed to form a double sided sign. Wire sign frames are made from heavy duty, high tensile, spring steel wire for easy insertion into the ground and long lasting upright sign display. A weather proof, 2 sided, non see-thru. Lightweight and economical. Free wire frame included. Recyclable plastic code can be printed on request. Union Label AFL-CIO: Available by request. Used on all political orders unless otherwise specified.