We will recommend KAVALLERIE Gel Pad Middle Riser. We already received same queries before from riders who have horses with deeply swayed back associated with horse muscle atrophy and Middle Riser with central riser pad and non-slip, shock absorbing properties works wonder to them. It is anatomically shaped to help support the saddle on dipped or sway backed horses. It provides the essential cushioning effect in the middle area of the saddle where pressure is often concentrated. Still, we would like to remind that if the swayed back is not severe you can opt between Middle Riser or Rear Riser model.