All hand-tied lace front wigs are made meticulously by tying individual strands of hair onto a lace mesh base creating a knot at the base. This technique is called ventilating. When darker hair is used these knots appear as small dots on the lace base that are noticeable in appearance. By making the knots lighter it camouflages the tiny knots and creates an illusion that the hair is growing from your scalp. Bleached knots is achieved by using a chemical process in which hair lightening product is applied the the hair knots only to lift the hair color. This type of process chemically alters the hair. It opens the cuticle and removes the color in an irreversible chemical reaction.