This foot soak can relieve swollen feet, cracked heels, athletes foot and other ailments . Alum powder has astringent and antiseptic properties that will leave your feet feeling clean and fresh. The box contains enough for 5 treatments. Size: 5 x 20g sachets Ingredients: Powdered Potassium Alum Instructions: Add contents of sachet to warm water and soak feet for 20 minutes. Dry thoroughly.