High Definition Hair's hand-crafted, human hair wigs are built with a patented technique called Transitional Density, which follows the pattern of hair growing naturally from the root of the wearer's head. Each High Definition Hair wig is made with a specially developed, patent pending scalp replica that matches your exact scalp color. This breakthrough scalp replication process offers a completely untraceable unit that can be parted anywhere you'd like and mimics every aspect of your natural hair...but even better! What separates High Definition Hair™ wigs from the rest is their low-maintenance application—NO GLUE IS NEEDED and NO THREAD IS NECESSARY because each hand-crafted unit is customized to fit your individual measurements.