HD lace is an ultra-thin, ultra-sheer lace material that blends seamlessly with all skin tones. Its high-definition quality makes it virtually invisible when applied to the scalp, creating a natural and realistic hairline. The HD lace option is available for all 4x4, 5x5, and 6x6 closures, as well as 13x4 frontals, and can be used for both individual pieces and full units.