Nikki Smith Hair Collection Transparent HD lace wigs are wigs that are made with a transparent lace material that blends seamlessly with the wearer's skin. The 13x4 lace frontal wig is a type of wig that has a 13-inch wide lace piece that extends 4 inches back from the hairline. This wig is designed to give the appearance of a natural hairline and part, and can be worn with or without glue or tape. The hair on this wig is typically hand-tied to the lace, creating a realistic and natural-looking appearance. This type of wig is perfect for those who want a more versatile and natural-looking hairline.