Saddle pad.....rubbing help?

GET A GEL PAD I HAVE A REALLY NICE 1 THAT I GOT 4 ONE OF HEY WORK VERY MY OLDER PONIES THEY WORK WELL I THINK . THEY ALSO STOP SADDLE SLIPPING AND GOOD 4 BAD BACKS .. I HAVE THE ONE U HAVE TO LEAVE ON FOR 5MINS BEFORE SADDLE SO IT CAN HEAT UP TO THE HORSE AND SIT PROPERLY