Spectra Plus by Ellen Wille is a luxurious, long style with flowing layers in 100% Remy human hair. The cap has a monofilament top, an invisible lace front hairline, and is 100% hand-tied. Then, to give you an even more secure fit, additional polyurethane strips have been added across the top, sides and nape. Spectra Plus is part of the Ellen Wille Pure Power Collection.