Elastic hair bands are made of rubber and nylon. Elastic hair bands have strong elastic, hold your hair tightly. Easy to stretch and resume quickly. The hair ties can keep your hair tightly and stay a ponytail whole day. They also can be removed easily without snag and tangle. No metal so will not hurt your hair. There are black hair elastics, enough for your replacement or spare. Neutral colors also suitable for men. The size of ponytail holders is 4.5cm diameter, 2 mm in thickness, which is suitable for all thick, thin and curly hair. Bulk hair ties can be applied in various occasions such as school, home, your office or using them when you are working, doing sports or playing.