NO KNOTS ,NO LOOP visible, it looks like the hair grow out from people's own scalp. It is very natural
The base has two mono layers. We knot hair on French lace or fine mono (bottom layer) first and then pull hair through the silk mono (top layer).
Thus the hair will look to be injected, because the knots are covered by the top mono layer.
It need professional work and take longer production time to knot.