EquiKOOL How does it work so well? EquiKool uses Outlast technology to lower the surface body temperature of your horse when under performance! Unlike membrane wicking fabrics that just transfer limited amounts of moisture, EquiKOOL turns your saddle pad into an active cooling system. EquiKOOL is laboratory-tested and field-proven to keep your horse 4 to 5 degrees cooler for extended periods of time.