A wig cap is the base of the wig that fits over your head. Wigs use an array of techniques for attaching the hair to the cap to achieve an equal array of different looks. Most wigs attach hair to the cap using what is called "wefts." Wefts refer to doubled-over strips of hair that are sewn onto the cap in long strands. Other wigs feature hair that's hand tied onto the cap, which gives the hair more natural movement. Certain wigs use methods that work for specific styles. Lace front wigs are best if you wear your hair pulled back from your face. Full monofilament wigs are best if you like to change your hair's part. Monofilament and hand-tied wigs work best for sensitive scalps.