The patented (US Pat D917109) Shoulder Relief Cinch is the only one of its kind on the market.  It actually changes the angle and placement of the latigo on the horse to prevent the saddle from being pulled into the shoulder blades, resulting in a free shoulder and better saddle fit.  

You might be wondering, how?  The shape of the Shoulder Relief Cinch allows for the center of the cinch to sit in the horse's natural girth groove, while the sides are recessed backward and attach to the latigos farther back on the horse's body compared to a regular cinch.  This design makes the latigos more perpendicular to the ground and neutralizes forward pressure on the saddle (from the pull of the latigos).

Additionally, the shape of the Shoulder Relief Cinch also makes it great for elbow comfort. The cutaways in the cinch pull it back away from the horse's elbow. 

For the best durability and to prevent any stretching, the Shoulder Relief Cinch is fully backed with nylon webbing from end to end.  This gives the resilience of webbing with the look, touch and feel of leather.

Lastly, The Shoulder Relief Cinch uses a removable liner system.  You can choose between limestone neoprene, 100% wool felt or 100% wool fleece.  They simply peel on and off, so one cinch can be used with many liners.  A common practice is to keep 2 liners, so one can be in use while one is being washed. 

If you need even more comfort, there is also a StretchTec version of this Shoulder Relief Cinch available.