I've got a couple of tarps that are excellent quality(Hennessy, JRB), and only exposed to the sun for a few days a year and usually just for a few hours a day. So, mostly either pitched at night or stored dry, very little sun. But they are over 10 years old.

Would Y'all trust them on a back packing trip? Or does sil nylon deteriorate after X years even when stored dry and out of the sun?