The Crystal Twist-up Stick is completely natural and effective and ideal for sensitive skin. It is shaped from crystallised mineral salts into a traditionally styled stick with a patented twist-up applicator. It leaves a minute film of mineral salts on the skin, which inhibit the growth of odour causing bacteria without stopping perspiration (good for the body). There is no uncomfortable stickiness or wetness once applied. Wet the crystal and apply liberally. Use right after bathing for maximum effectiveness. One stick will last about 9 to 12 months.