Not a "sun shower"
Follow up review ....this is a great shower option but do not expect the typical solar shower experience. The walls are solid black with no clear side to allow the solar radiation to heat the water (like a typical old school sun shower). But I filled it up and hung it in a tree, allowing the sun to hit it all day. Then after a long day of trekking around the desert canyons, I arrived back at camp and showered off with air temp water. Not too hot, not too cold, just perfect. Who wants to shower with hot water after a day of hot desert hiking?? The twist head that allows the water to flow thru the shower head worked well. After my shower I was able to let three other people shower with the water left over. Amazing capacity for such a small packable item. Go for it.