We purchased this camp shower in hopes of using it at a campground with no showers. We set it out in the sun for 5 or 6 hours. The chart showed it should be about 100 degrees, but it was room temperature at best. We secured it on top of our SUV and the water came out of the hose at a drizzle. In order to get the water out of the bag at a reasonable rate we had to remove the top (where you put the water in), and pour it over our heads. I would not recommend this product.