As chaz is trying to say, I wouldn't worry about UV much. Don't set it up in the sun. Backpackers don't need tents that sit in the sun. They set it up before dark and take it down in the morning. Usually all of this is done in the shade, especially in the mountains when the sun is behind the mountain and the sky is still bright. If it is snowing, not much sun. If it is raining, not much sun. Basically, the reasons people need a tent for backpacking normally equates to a no sun condition. I wouldn't worry about it. <img src="/forums/images/graemlins/wink.gif" alt="" />