Synthetic full hand-tied wigs are not as natural as human hair full hand-tied wigs. First, human hair full hand-tied wigs use Swiss lace, French lace, silk top, or mono net. Synthetic full hand-tied wigs are partially French lace and mostly stretch lace. Second, the quality of stretch lace human hair full hand-tied wigs use is much higher than synthetic full hand-tied wigs. Third, the hair strands of human hair full hand-tied wigs are hand knotted to the lace one by one. But the hair strands of synthe hair full hand-tied wigs are hand knotted to the cap bunch by bunch (every 3-10 hair strands as a bunch).