InSPAration 7493 HTX Protect Therapies Crystals for Spa and Hot Tubs, 19-Ounce Immerse 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 Perfect for the active lifestyle or anyone who wants to experience the next level in medicinal body treatment Hydrotherapies Sport RX - "HTX"