This wig unit is a human hair blended wig unit which means that it is blended with high quality human hair and synthetic fibers. This unit can still have heat applied to it as hot at 310 degrees. This hair will last as long as 1-2 years with proper care and storage. This units can easily worn with little to no glue needed. Variety of hairstyles can be done with this glueless wig unit. These wigs make a bad hair day easier to manage! These wigs fit all head sizes and shapes. They have adjustable straps inside of the cap that help the wig feel more secure.