Single drawn VS. Double drawn
Single drawn Remy hair, also called Virgin hair, is made up of hairs of all different lengths as it grows naturally on the head. The cuticles are intact and these pieces look very natural.
Double drawn hair is sorted so that all the hairs in a weft are within one or two inches in length, this is sorted so that all of the strands are of the exact same length. This is the most expensive grade of hair because of the care that is required and the time it takes to sort the hair so meticulously.