【Brand New, Unopened】 EPSOPIA bath salt. Will ship via Yu-Packet Plus within 24 hours of purchase. Thank you. Quoted from the website ↓ ＜Product Description＞ Material: Magnesium chloride Contents: 600g Country of Origin: Japan (Seto Inland Sea) How to use: ● Add one included spoon of salt to the bathtub during bathing. (For dry seasons like winter, or if you want to enhance moisturizing and warming effects, add 3-5 spoons for better results.) (Water volume is assumed to be 200-280 liters.) ● Mix well to dissolve. ● Over 99.5% of sodium has been removed, so re-heating is possible. ● The remaining water can also be used for laundry. Features: ● Epsopia is a 100% nigari (bittern) bath additive from the Seto Inland Sea. ● Completely additive-free, and food additive grade, so it can be used safely for babies. ● Contains minerals and magnesium, warming you to the core of your body. ● Concentrated crystal formula, compact and good for 45 uses.