A Jewish wigis usually made with
a cap construction that has a skin top, which is also called as
French top. The skin top/ French top is constitutive of three
layers. The hair is knotted/ tied on the middle layer, and then the
hair is pulled out from the outer layer, which is Chinese silk. It
seems as if the hair is growing right from the scalp, and one can't
see the knots from the outer layer, which is knotted/ tied on the
middle layer. The inner layer is a kind of net to make customers
feel comfortable to wear.