NERD® Loose Wave (Raw)Raw Human Hair Extensions. Our Chinese Raw Hair Extensions are made of 100% unprocessed raw human hair with the high quality that really brings out your feature makes you stand out. It is easy to maintain with proper care. To measure curly hair length, gently pull a strand of hair straight from the scalp to the tip, then measure the length with a tape measure while keeping the hair fully extended; essentially, you should measure your curly hair as if