Originally Posted by phantomhorse13
The hack is generally called a "s-hack." I got it and the rest of my tack at Taylored Tack
. Mandy makes it all personally in a cute shop in her backyard (she lives near me and is an endurance rider herself). Its fantastic stuff!
I have an s-hack as well, and my Arab seems to like it, but it's still a work in progress to convince him to not flop all his weight on his forehand and go, LOL.