100% human hair full lace wigs with silk top The silk top is constitutive of three layers. The hair is knotted/tied on the middle layer, 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.