All TCS pads are excellent with treeless saddles becuase they create structure and ensure that weight is minimized on the skeletal structure. Most riders can take an inadvertent bounce from time to time and with a treeless saddle this can be a little uncomfortable for both horse and rider. Horses are most comfortable when weight is evenly distributed on the muscular structure on either side of the spine. TCS pads provide the “bars” or panels that the treeless saddle lack, but in a much softer and more flexible form.