Our 100% Vietnamese body wave Hair is the highest quality Vietnamese human hair on the market. It is collected from a single donor and has not been chemically processed. Vietnamese hair is coarser and thicker in texture then Brazilian and Malaysian hair. Meanwhile, Vietnamese hair is soft & silky with a sleeker, smoother texture. It looks gorgeous straighten, curled or in its natural state. The lengths are available in 12"-30". Each bundle is 3.5 oz. Our Virgin Vietnamese body wave Hair comes in a natural off black color 1b and will last up to a year with proper care and maintenance. For a full sew in we recommend 3-4 bundles. If you desire fuller hair with lots of volume we suggest you go with 4 bundles of hair. Remember the longer the hair the shorter the weft.