1. The hair is good quality human hair. It can be dyed, permed and other process. But any processing will damage the curl, so please take care of the hair. 2. The hair is 120 gram 10 pieces. If you have normal hair, one pack is enough for full head. If you have thick hair, 2 packs are better. Usually, long hair need 2-3 packs for full head. 3. The hair is kinky curly texture. It is made from straight hair. So it look like shorter than straight hair. When you choose the length, please consider this situation. The Best Choice for Clip in Hair Extensions Series 1. 28 mm is the minimal clip which is more comfortable to install. 2. High quality stainless steel clips can last life time 3. Similar color with the hair and lace, invisible, more natural 4.