what is silk top?

There is a layer lace which is made of silk fabric on the top front of the cap. When the hair is knotted, it will be concealed between the layers. It's hard to notice the knots it will give you the nice feeling that it seems like the hair is actually growing out of your scalp,the knots are 100% invisible.（https://www.nerissahair.com）https://www.nerissahair.com