Our virgin Hair is the finest quality human hair available. Each bundle weighs approximately 3.5 ounces and has been collected from one donor, all cuticles are aligned in the same direction, and the wefts are tightly sealed. All Virgin Hair is available in a Natural Black (1b) color and can be colored and bleached to achieve the color that you desire. We also offer customized color services. With proper care, the Hair Extensions can last up to a year or more. How Much Hair If you are installing a full head weave, that's typically 16"-24", we highly recommend that you purchase at least 3 bundles of hair. If looking to achieve a very voluminous & extra glam look, 4 bundles are recommended. If you want anywhere from 26"-30" in length, we recommend you buy 4 bundles of hair. Over 30" you'll need 5 Bundles.