The amount of hair on a weft is critical to proper installation. Be it clip-in or other weft attachments, inadequate amounts of hair on the weft = more hair needed, which = unnecessary attachments. Sparse amounts of hair on the weft is common in cheaper hair products. It’s one of the many ways manufacturers cut corners in order to reduce prices. These price reductions in hair may seem like a savings, but they only mean higher costs when actually trying to incorporate the hair with your hair. There won’t be enough hair throughout, or enough hair on the bottom to fill in necessary length.  More attachments also means more expense installing the hair.