How to Choose the Correct Western Saddle Seat Size

a simple back pad. Some riders opt for treeless saddles to make it easier to lift them onto the horse for personal comfort preferences during riding or to fit horses with especially wide backs that may have uncomfortable pressure points with traditional saddles.
Different Types
While there might not be a full tree inside a treeless saddle some may have a flexible fiberglass cantle and pommel. Other types of treeless saddles may have only layers of padding. There are many different makes and models of treeless saddles so if you are shopping for one be sure to try out many different types. Just because a saddle is treeless does not mean that it will fit any horse you put it on. Not all treeless saddles fit all horses or riders and when purchasing one it is just as important to try before you buy as with a traditional Western or English saddle.
Pros and Cons
There are some advantages and disadvantages to riding with a treeless saddle. Many are very comfortable for the rider. They can be lightweight which may be important for riders with problems lifting. In addition they allow you to sit closer to the horse so you may find you have a better feel for your horses back. Some riders like the close contact provided by treeless saddles while others may find they miss the twist and shape of a traditional saddle as many treeless saddles make you sit wider.
This type of saddle is also great for a horse who is hard to fit. If your horse has a very wide back or uneven shoulders treeless saddles may be the answer. Treeless saddles can have pressure points just as traditional saddles do so you cant just assume that you are eliminating the possibility of the saddle causing soreness for your horse just because it is treeless. If the stirrups are attached to a single strap or the girth or cinch has only one point of connection this may cause a pressure point in that area. Some may transfer the pressure to the underside of the horses girth area. A well designed treeless saddle will have rigging that distributes pressure rather than concentrating it on one area of your horses body.
One issue with some treeless saddles is that they may not be as secure as traditional saddles. Because this type of saddle doesnt have a tree to stabilize it it may be
more inclined to roll taking you with it. It might be wise to use a breastplate straps that go forward from the front of the saddle around the horses chest to help prevent the saddle from turning. If your horse has low withers or a very round or flat back you may have to be very careful about the type of treeless saddle you use and how you secure it.