This is the most ancient weaving technique of making hand knotted carpets. A knotted-pile is a carpet containing raised surfaces or piles from the cut-off ends of knots, woven between the warp and weft. A hand knotted carpet is influenced by width and number of warp and weft, pile height, knots used and knot density. Most of the hand knotted carpets are washed which gives them a plush & softer hand feel.