... the toupee included single knot, double knot, hidden knot,injected knot etc..6)The material included Swiss lace, French lace, Mono, PU ... : We have different kinds of base materials, like Fine Mono (mesh), Lace, Polyurethane (skin), etc8. Base color: Fresh, pink, light ... or only front12. Front design: Lace, Scallop, Smooth Line, Skin.13. Knots: Bleached knots, single knots, double knots and hidden knot ...