The TRUST Sponge Bit is designed for horses with very sensitive mouths or with mouth injuries. It can be used as a daily riding bit or used occasionally when the horse is very sensitive in the mouth due to a wound or recent dental care. The TRUST Sponge Bit is best used with TRUST Wound Elixer, a natural blend designed to help heal the horse's mouth corners. To use, simply apply the elixir to the sponge mouthpiece, allowing it to soak in before putting the bit on the horse.