I-tip hair extensions are also known as keratin hair extensions and tip hair extensions. They are applied to your natural hair near the scalp in small "bundles" with a heated keratin adhesive. Since your hair is already made of 90% keratin (a protein compound) this method is actually gentler on hair than regular glue. This technique is the most versatile of extension installations. Once installed, your extensions are naturally flat as if its your own hair and can last up to 6 months. The hair is lustrous, silly, tangle free, dye-able long lasting quality natural wavy hair. It also holds curls and beautifully and flat iron smooth and straight. With proper maintenance, your hair and weft can easily last up to 1 or more years.