The difference between single drawn & double drawn hair
Single drawn hair is comprised of a variety of lengths which causes the thickness of the weft to taper towards the end - unlike double drawn extensions you may find that this type of hair extension is uneven and gets very straggly towards the tip.
Hair that is the exact same length. The painstaking process required to make this type of hair has to be performed by hand and it can take quite a long time to arrive at a finished product. The great advantage is that the hair maintains exactly the same thickness from root to tip and this is why it is more expensive - upwards of 1000 grams of hair are required to create an extension weighing just 100 grams.