PURE EPSOM SALT: Made with pharmacy-grade magnesium sulfate to help ease aches and soreness from muscle pains FRAGRANCE FREE: Fragrance-free and fast dissolving, ultra-fine crystals dissolve quickly in water HOW TO USE: At bedtime, pour 2 cups under warm, running bath water and soak for 20 minutes FREE FROM WORRY: Paraben free, phthalate free, and never tested on animals