Check out the new FreeFlow Breastplate
The new Barnsby FTS FreeFlow Breastplate is expertly designed to allow your horse to use his shoulders to the maximum, while offering you absolute security in the position of your saddle. Combining the actions of a martingale and a breastplate, this beautiful piece of equipment incorporates an elastic inset that runs freely through a central ring. This system facilitates complete freedom of shoulder movement while also ensuring that the tension stays in perfect balance between the girth strap and the D-ring attachment, keeping your saddle stable and secure on your horse’s back.
http://www.barnsby.com/bridlery/fts_freeflow_breastplate/?RangeID=5