Introducing Signature Series E-Juice. Signature Series is the original collection of e-juices created by Paragon Labs. With many exotic vape flavors on the market today, Paragon took the initiative to innovate new vape flavors while revamping and improving upon popular e-juices on the market today. With 11 different vape flavors in the Signature Series Collection we guarantee there will be a vape that will satisfy your palate. Try our Signature Series Collection of e-juices today and learn why our vapes are dominating the industry.