Tedex Breeching Seat for use with tedex harness. Breeching straps available separately. Sizes as follows; Shetland 86cm (34") Pony 104cm (41") Cob 117cm (46") Full 127cm (50") X Full 140cm (55") What is the Breeching Seat?The seat of the breeching is the wide strap which passes around the horses bottom to allow breaking. It is attached to the vehicle via breeching straps and the height is adjusted via the loin or hip straps. It is very important that the breeching is in the correct position. If it is too high, a consequence of the hip straps being too short, the seat of the breeching may slip over the point of the buttock and lodge under the dock. This would most likely happen when you were travelling downhill and would lead to the horse being placed in a great deal of pain and potentially running from this pain down the hill. If it is too low, the seat of the breeching will be putting pressure too far down the leg where the horse is unable to support the weight of the vehicle. This may cause him to slip or run to get away from the discomfort. To set the breeching seat to the correct height look for the widest part (point of buttock) and narrowest part (approx a fist above the hock) and set the breeching roughly in the middle of those two points. If you are still unsure you should contact a professional who can assist you.