Ox Bow Colorful Equestrian Bits Corded Edge Pillow 20" x 20"High Quality 20" x 20" Linen Equestrian Pillow with Soft Feather Down Fill Hidden Zipper in Back Linen Corded Finish Edge. 20" x 20" Hidden Zipper in Back Linen with Feather Down Fill Corded Finish A bit rests where there arent any teeth on the bars of the horses mouth and along with the bridle, helping the rider communicate with the horse. The expression, Champing or Chomping at the Bit, comes from the anxious behavior of a horse pawing and tossing