Cleaning CoVid19 from equipment in Gear and Rigging April 3 3 hours ago, evh said: That is perhaps a but understated. UV is very bad for nylon. It would not be surprised if it ruined your gear in no-time. If we assume a total of 10 minutes of UV exposure for each jump, which I think is a reasonable number, I think it would help us to get a perspective of how much our gear is exposed during a season of jumping: 100 jumps = 100*10/60 = almost 17 hours of exposure. You may think the 10 min/jump is too much or you jump more/less, but we already allow the sun to drench our gear. I don't know how much time it might take for UV light to take care of the cooties on nylon, but I wouldn't expect it to be hours.