How to use the shower bag : 1: Before the first use, with 1 tsp Baking Soda bubble warm water wash bag. 2: Filled with water, then expose it with the black side up on a flat surface and direct sunlight. 3: After 3 hours heating can be used (Water heats up to 45°C after 3 hours with direct sunlight ). Warning: 1,In order not to affect the service life of the shower bag. The Water temperature should not be over 50℃/122°F. 2,Please try the water temperature before using, if it is too hot you can add some cold water. 3,Water in the bag is not drinkable. 4,In order to avoid being scratched the outdoor bathing bag, please do not touch sharp sharp objects. Package list: 1 x Solar Shower Bag 1 x 2M Hanging Cord With Hook 1 x Tube with Shower Head 1 x Mesh Carry Bag