When making human hair wigs, use very thin crochet needles to weave the human hair onto the lace cap. Only one or a few hairs can be woven in a stitch. The human hair wigs are made from human hair, especially the hairline, which is sewn on one by one to create a intricate hairline that blends into the wearer's skin. 

The lace cap may contain as many as 150,000 nodes, and the weaving process takes more than 40 hours. This detail-oriented craft requires patience between cutting and sewing and counting stars. This is the most tedious step in making a wig cover, which is called "hair arrangement" in the jargon. One hair is tied into a small hole on the lace net cap, and the craftsman's skill and patience are also knocked. The hook has to be sharp, and whether it's a lace cap or hair, it breaks easily.