Higher Nature Colloidal Silver Spray contains pure and quality silver that is 10-20% ionic and 80-90% particulate (colloidal). The two ingredients in this spray are purified water and medical grade silver. The colloidal silver contains particle sizes in the region of 0.6-5 nanometres. This small size is important as smaller particles provide a greater surface area per volume which in turn allows the silver to have a greater effect. This spray is ideal for using at home or on travels. The bottle is also refillable.