The activated charcoal and bamboo Konjac sponge comes from Japan, primarily, and is found to be rich in vitamins A, B1, B2, B6, B12, C, D, & E, proteins, lipids, fatty acids and natural minerals such as copper, zinc, iron and magnesium. It also boasts of a neutral PH, which means it will help balance your skin. It is a naturally alkaline plant and won’t damage the epidermis of your skin. Hang it up in your shower or throw it in your skin/gym kit. They will last for 2 months and we suggest that you replace them every 2-3 months.