I have hospital felt. Throw them in the washing machine. Wash with dreft or other gentle detergent and hang to dry. Good as new.
One problem with the neoprene - sand can get in and not get out. Several friends who used them distance riding ended up with some nasty girth galls.
mls, sorry for dumb question, but do you put the whole cinch in washing machine or it's removable?
Yes, I see what you are saying about sand and distance riding. But my ride is usually up to 1 hour (little longer if I go on trail).
So far nothing in 3 years (knock on wood, of course).