100% Virgin Brazilian Straight Hair is 12A grade, which is top premium hair; collected from one donor. This is texture is best classie’s who prefer silky soft bone straight. Hair can be dyed, bleached and styled to perfection. Bundles are full and tangle free, however, the longer the bundle the thinner. Each bundles are 3.5oz and comes in a natural color, 1B. Hair can last up to one year with proper care and always tie hair hair with a silk satin scarf! Number of Bundles needed for a full head: 14"-20" - 3 Bundles | 20"-26" - 3 Bundles | 28" and up 4 Bundles. Disclosure: Numbers of bundles depends on how thick you like your install to be.