How to use: First, fill the 12L capacity storage unit with water. Then, put on the vest and adjust the straps for a comfortable fit. You can easily access the water while running. Make sure the water tubes are properly connected. Precautions: Don't overfill the storage unit to avoid spills. When using in rough terrains, be careful not to damage the vest. Maintenance advice: After each use, empty the remaining water. Wash the storage unit and the vest regularly with mild soap and water. Let them dry completely before storing.