HD Thin Skin uses groundbreaking Invisible Inject Technology to create the true appearance of each hair growing directly from your own scalp, with absolutely no visible knots. The result is a flawless, ultra-natural look that is undetectable even under bright light and close inspection. For our thinnest skin option, we use the lightest, most advanced ultra-thin polyurethane available, designed to replicate the softness and realism of natural skin. Using the V-loop ventilation method, each strand is carefully looped through the base.