Fill the bathing bag with water and hang it on the branch with back side exposing to the sun, and this PVC shower bag will effectively absorb the solar energy to heat up the water to about 86F°(30°C) in 3 hours with direct sunlight so you can take a shower after sports outdoors. Feature: To hold 20L water, enough to flush the bath for 8-9 minutes(40L for 10 minutes). Solar energy to heat up the water to about 86F°(30°C) in 3 hours with direct sunlight. Handy on/off valve connected to shower head and convenient to control. Strong handle is reliable to hang on the branch or bar. Specification: Material: PVC Capacity: 20L / 40L (optional) Weight: 330-470g / 11.6-16.5oz Package weight: 410-540g / 0.9-1.1lb Package size: 31 * 15.5 * 5cm / 12.2 * 6.1 * 2.1in Package List: 1 * Shower Bathing Bag 1 * Tube with Shower Head 1 * Hanging String