The present invention provides a hair accessory characteristic of Shore Hardness between 41 D and 60 D and made from a polymerized plastic mixture including acrylonitrile-butadiene-styrene (ABS) resin, thermoplastic rubber (TPR), defoamer, lubricant and optical brightener. The hair accessory which is bent and deformed under effect of a tensional stress does not induce white crease marks, cracks or complete breaks and is able to rebounds and returns to initial status after releasing of the tensional stress. The hair accessory with advantages including flexibility, rebound elasticity and plasticity does not compress or hurt a user's scalp and contributes to safety use when the user takes the hair accessory to comb her hairs.