Volcano Double Scented Wax Melts. Fruits, citrus & sugar, this scent will blow you away. Naturally strong including soy wax which will throw 50+ hours of fragrance when melted in a standard electric tart warmer. DOUBLE SCENTED - We double load the fragrance oil compared to other companies. That means a stronger and longer lasting scent. Unlike other brands, which use "just enough ", we use a special recipe specifically designed to give our wax melts the strongest and longest lasting scent throw in the industry. Give it a try you wont be disappointed! These wax melts use soy wax in a special blend that maximizes scent throw. All scents are phthalate free. Will work in all popular tart warmers, including Scentsy, Yankee Candle or standard electric tart warmer These will fill a large room with awesome scent. Hand poured in Michigan, USA