I just remembered that a Bungee jump cue has a leather tip.
I bought my first one back in 1999 in Vegas at the BCA tournament. I also was given a spare tip. I have gone on to phenolic and sold the Bungee since then, but I just found the tip in my junk drawer.
It is made of pigskin and seemed to work well on the Bungee. I probably will try it on one of my current J/B cues.