Ardell Individual Knot Free Lashes are a permanent lash extension treatment that will add volume, length and glamour to your eyes. Unlike other individual lashes, Ardell lashes are not knotted at the base of the cluster, making them very lightweight, natural and virtually undetectable. The Knot Free lashes are waterproof and can last up to 6 weeks with proper care. The Lash extensions will only fall out when the natural lash falls out during the natural growth cycle. One pack contains 56 lashes. Available in 2 colours: black and brown, and in 3 sizes: short, medium or large.