This particular frontal piece is lace based with free style parting. (Lace Base) meaning the base of the closure is made of a thin lace fabric to insure a natural seamless look once installed. (Free Style Parting) meaning you're able to have versatile parting for you're styling preference. When using a closure, it's considered to give your weave a more flatter and seamless appearance when sewed or glued around the reinforced perimeter. However, If the knots are too dark at the root of the base then the unit will not look as realistic. Bleaching the knots is recommended to give a more realistic look, the objective is for the hair to appear as if it is growing from your scalp. Please consult with a professional weaving/colorist stylist before installing or using ANY chemicals.