What it is: A scent refill for your Vitruvi Air Waterless Diffuser (sold separately).What it does: Fill your home with the Vitruvi scent of your choice using a Boost Scent Refill and your air Waterless Diffuser (sold separately). Each scent refill lasts up to 30 days. Natural Beauty & Wellness products are free of sulfates, phthalates, parabens, petrochemicals, mineral oil, silicone and talc Compatible with the Vitruvi Air Waterless Diffuser (sold separately) Cruelty-free Made in the USA