inSPAration® Hydrotherapies 725 19 oz Relax Sport RX Liquid. Take it to the Next Level in Aromatherapy by immersing yourself in the power of Hydrotherapies Sport RX Crystals. Packed with Vitamins, Minerals and Natural Extracts, HTX is the ideal remedy for the active lifestyle. As you soak your body is being Stimulated, Energized, Protected, Relaxed, Rebuild and Elevated through this special blend of Magnesium Sulfate(Epsom Salt), Solar Sea Salt, Vitamins and Natural extracts. Perfect for the active lifestyle or anyone who wants to experience the next level in medicinal body treatment. Hydrotherapies Sport RX - "HTX".