Aids build a way of going
A training aid is a tool for building correctness: a horse that pushes from behind, lifts its back and takes an honest contact. Used toward that, the right aid shortens the work. Used to force an outline, the same strap costs more schooling than it saves. Everything on this page assumes the first reading.
What each type does
Draw reins are the biggest group: CWD's German draw reins in rope or leather, Trust's Monaco draw reins and Dyon's draw reins. In an educated hand they suggest flexion to a horse that sets itself against the rider, and they yield the instant the horse does. The CWD Gogue encourages the horse to lower and stretch rather than hollow, on the lunge or ridden. The QHP bungee training aid and the Rein Rite are the groundwork pieces, there to keep a lunge session building the topline instead of just spinning circles.
Tools for experienced hands
None of this equipment belongs on a green horse with a green rider, and no honest shop pretends otherwise. If a coach has named the aid, this page probably carries it or its close equivalent. If you are choosing without one, describe the horse and the problem to info@equijumpltd.com before you buy; selling the wrong aid helps nobody.