Genuine synthetic vacuum bags for Electrolux cleaners: ENERGICA ZS200, ZS201, ZS202. Synthetic bags last longer than ordinary paper bags. They have a greater capacity, provide better filtration and are more resistant. We recommend that bags should be changed regularly and filters should be changed every 5 vacuum bags. All filters should be replaced at least twice a year or when they become visibly soiled. This kit includes 5x disposable synthetic dust bags and 1x motor filter. Electrolux vacuum bag reference is ES 17.