Originally Posted by Saddlebag
My take on this is that the decision should be based on the type of cinch. If the cinch is reinforce with nylon webbing, then go with leather. If it's a string type cinch with a little give then nylon straps are ok. The horse does need that the cinching system have a little give.
I'm using a Weaver Airflex with my Paint, so I'll probably switch the tie strap out for leather. For my QH, I'm using a mohair, so I'll probably stick with nylon.