Ok just wondering whats the difference between the two. Are saddle pads shaped, numnahs more rectangular. Also what do people ride in. My understanding is that you should fit the saddle closely to the horse, a numnah is only supposed to protect the saddle from absorbing body grease. So why do some people use a thick numnah. Ive noticed that top show jumpers seem to have two numnahs under the saddle. Is this to protect the back or some other reason.