The revolutionary SO.CAP. USA Hair Extension System uses only 100% human hair of the highest grade which is pre-bonded with natural keratin tips. This advanced keratin bonding technology is combined with state-of-the-art professional electronic application equipment to produce a safe, incredibly easy-to-use extension system that allows you to create spectacular, natural-looking results for your hair without any damage to their existing hair. With 81 unique natural shades and exciting fantasy colors to choose from, it's easy to add incredible length, fullness, texture and color. It's no surprise that most of the top names in entertainment and fashion use human hair extensions to achieve today's hottest styles.