The present disclosure is directed to composite structures, such as low friction liners, exhibiting superior performance. In certain embodiments of the present disclosure, a composite structure can include a first outer major surface adapted to contact a movable surface, and a second outer major surface adapted to contact a stationary surface, wherein the first outer major surface has a lower surface roughness than the second outer major surface, and wherein the composite has a mean average thickness of less than 0.3 mm. The composite structure can have unexpected synergistic improvement in properties such as low surface roughness, high dielectric strength, high resistance to edge wicking, high resistance to surface wicking, low content of surface defects, an increased abrasion resistance, and combinations thereof, particularly the maintenance of these properties over a long life.