100% human hair wig with nano miracle silver big cap. A multifunctional, anti-microbial fiber wig cap. With an entirely new breed of Ag fiber developed through nano technology, you can now say goodbye to all mold and odor causing bacteria, hair loss and scalp irritation that come along with ordinary wig caps. Nano miracle silver provides that extra protection against UV rays. It can even radiate far-infrared rays, which are favorable to the body.