Swimline Corp. is a family owned and operated business. Founded in 1971 Swimline has grown to be the largest manufacturer of above-ground swimming pool liners in the world. In addition Swimline Corp. is the largest importer of in-ground and above-ground swimming pool covers and related accessories. In 1990 Swimline founded International Leisure Products, increasing their close relationship with the swimming pool industry by supplying pooltoys, games and accessories. Sales of the ILP line has steadily increased with popular acceptance of the "Swimline" brand which is reserved for sale in the pool industry.