Usage Information: Eclipse Halos are hypoallergenic using gentle surgical grade PBA, Corn and Latex-Free adhesive. Application requires gentle cleansing of the nasal area using Dream Preps or mild astringent such as witch hazel or alcohol for oily skin; ensure that skin is dry before applying ports. Note that soap contains oils which interfere with seal. Using a mild astringent is critical for an optimal seal. For complete instructions review the documentation that came with your equipment.