What girths do you use? I used to use wintec dressage girths but on several occasions, they slipped when getting on and off (and yes, they were tightened properly) it would just get sweaty and slip right off. Not a pleasant feeling. So I'm looking for something that WON'T SLIP, is comfy for the horse, and won't cause excessive sweating around the girt area. And one that isn't too expensive. Anything more than $60 is just tooo much!