Bulk refers to a bundle of hair with no weft. This is raw hair is an unprocessed product that can be used to make wigs, toupees, bangs, wefts, tapes and keratin bonds. All our hair is 100% natural and allows for any type of treatment and processing. It does not contain impurities, as well as fake silicone coatings. They have a preserved direction of hair growth (Remy), which does not allow tangling and enables permanent placement.