So apparently my brain is not functioning and Allison I didn't read YOUR post carefully! (what is wrong wtih me today????) You mean that you think that when you tighten it you think one side will be tighter then the other? Sorry, I read it to mean that they elastic stretches out differently. Interesting, I've never heard of that. I like the double elastic b/c it's easier to tighten the girth and it seems to me that it would be more comfortable... but I've used the one sided on even very girthy horse and never had a problem.