a hair tie to fasten locks of hair into pony tails , braids or dred locks . the hair tie comprises a generally planar , elongated material containing corresponding fastening surfaces at each end . the hair tie encircles the lock of hair in a belt - like fashion and fastens upon itself . the hair tie is capable of tying different amounts of hair by varying the positions the ends of the hair tie engage . additionally , the hair tie incorporates an elastic loop and a friction pad to ensure the hair tie securely attaches and remains in position on the lock of hair . ornamentation , such as jewelry , beads and ribbon , printing and logos may decorate the hair tie , allowing individuals to decorate their hair as well as fasten it .