The basic pre-requisite of human hair extensions is that they be collected from human donors. Apart from this basic commonality, human hair extensions have a lot of differences depending on their origin, color, texture and also on the method of extraction. Based on origin, human hair extensions are classified into categories such as Brazilian, Indian, Caucasian, European, Oriental and African. These are generic names given to human hair extensions which exhibit specified characteristics. The name may not pertain to a specific geographical area. Other physiological traits such as the color and texture of the human hair extensions are largely dependent on their nativity. For example, Brazilian human hair extensions are naturally available in shades of blacks and brown with a straight or wavy texture. Blonde or curly human hair extensions are rare among hair of Brazilian origin. The extraction method will determine whether the hair remains Remy or not and Virgin or not. The definitions of Remy and Virgin hair have been given in our earlier blogs. Similarly, the human hair extensions may be composed of hair in a wide variation of length if they are single drawn, or have hair of almost uniform length if they are double drawn.