Pro-Lite Latex Gel
is not the foam pooh-poohed by the purveyors of wool-flocked saddles. That nasty stuff is polyurethane and poured foam, which break down or become hard over time. Pro-Lite is something else entirely: latex foam injected with gel. It will outlive most of us mortals and possesses inexhaustible elasticity. Horses love it on their backs.