Using these Pullman synthetic vacuum bags is easy. Just open the pack, take out a bag, and install it in your compatible JYBP or other specified backpack vacuum cleaner according to the cleaner's instructions. When the bag is almost full, replace it with a new one to maintain good suction. As for maintenance, keep the bags in a dry place away from direct sunlight. Don't overfill the bag as it can affect the vacuum's performance and increase dust back - flow. If you have any questions, feel free to contact our customer service team.