About Prime Hair by Ellen Wille: The Prime Hair Blend styles are made with a mixture of the finest 40% human hair and enhanced with an innovative high heat 60% Synthetic fiber, which offers the best of both synthetic and human hair worlds! Prime Hair Blend offers the lightweight density and "staying power" of synthetic and the stylability, feel and movement of human. The heat friendly premium synthetic fibers allow heat styling up to 350 degrees Fahrenheit. Any style you apply to the Prime Hair Blend collection will hold longer, even through washings! This is Ellen Wille's workmanship at its finest, creating the ultimate wig wearing experience.