Please Note: LF stands for Lace Front. This wig has a pre-cut delicate lace at the hairline of the wig, creating an amazingly realistic look atyourhairline. Please be cautious not to brush the lace area too hard, as you could pull strands of hair out or possibly tear the lace. Treat this wig like delicate lingerie. Mono stands for Monofilament. The cap on this wig is made of a see-through material, which gives the appearance of a natural scalp at the crown. The hairs at the crown are individually hand-tied and will lay much flatter on the head, because there is no machine-teasing.