Instructions for use: 1. Before the first use, soak the shower bag in warm water with 1 teaspoon of soda water. 2. Fill it with water and place it on a flat place with the black side up so that the sun can fully shine. 3. It can be used after heating for about 3 hours. 3 hours can make the water temperature rise from 15.5 degrees to 40.5 degrees). warn: 1. The water temperature should not be higher than 50 degrees. 2. Please test whether the water temperature is suitable before use. If it is too hot, you can add some cold water. 3. Do not drink. 4. When not in use, please drain the water. How to use: Insert the PVC pipe from the round opening on the top of the bag, open the red water plug and inject water, then wrap the rope around the horizontal pole and hang it on a fixed object, hook it with a rope hook (Note: The rope hook cannot be directly hung on the object superior).