IMO, they just build up too much heat under them, and the rubber texture grabs hold and pulls.
Didn't ecurbhs saddle come with a neoprene cinch? Heather had an Abetta saddle with a neoprene cinch that came with the saddle. I let her use it one time till she could get a differnt one. Before the ride was over Rocky was turning around and biting at it:). I was pretty sure it was the cinch that he wasn't liking, so we switched saddles and he stopped doing that. He didn't get galled, but I think it really pulls. JMO.
You'd just have to try one to find out if it will work.
Becky
ecurbh's came with a felt cinch.