A composition is disclosed thai comprises. (a) at least one saturated-fatty acid bis-amide of the structure: Formula (I) wherein R1 and R2 are independently saturated hydrocarbyl groups comprising from 1 1 to 35 carbon atoms, (b) at least one unsaturated-fatty acid bis-amide of the structure: Formula (II) wherein R3 and R4 are independently unsaturated hydrocarbyl groups comprising from about 11 to about 35 carbon atoms; (c) at least one particulate cellulosic material; (d) at least one thermoplastic resin; (e) at least one coupling agent for coupling the particulate cellulosic material (c) to the thermoplastic resin (d); (f) optionally, at least one inorganic particulate material; and, (g) optionally, at least one additional lubricant.