100% Human Hair Custom Whole Lace Wigs are wigs made by your specific head measurements. The entire cap of the wig is made of lace material. A 100% Human Hair lace front means just the front of the wig is made of lace. From the middle of head to nape, is made of a regular wig cap material. A 100% Human Hair Stock wig are made by using standard or average head sizes. Example, if your head measurement is a 21 that is not an average size. You would have to buy a 22, an average size. They do however come with adjustable straps to tighten or loosen. Synthetic wigs are neither custom or human hair. But they come pre cut & styled, maintenance free.