The Solid Air room refreshers feature an open-air design that creates maximum surface area exposure and space for air flow, which provides effective and efficient fragrance release. Available in Xcelenté lavender fragrance, Citrus Mango, Ocean Breeze and NABC Fresh, Solid Air room refreshers don’t require any batteries and are effective for 30 days. Infused with natural fragrance oils, the Solid Air room refreshers eliminate the need for messy gels or liquids.