You must be over 18 and live in the United States, in order to participate. There is no charge for product or shipping. We simply ask that for each shipment, you complete the online survey, in order to remain as an active participant. We agree to keep your name and contact information confidential. By participating, you allow us and our clients to use your opinions, feedback, and reviews for use in product development and marketing materials, as long as your personal information is kept confidential.