Veevus GSP Available in 100 - 150 and 200 Denier G.S.P (Gel Spun Polyethylene) is by far the strongest thread on the planet after our Veevus thread. In difference to other brands the Veevus G.S.P. thread has been designed with a slight twist preventing it from opening up, and thereby making tying with it a breeze. It lays completely flat and is the smoothest thread to spin hair with. Each spool contains 75m which is 67% more thread than offered by anyone else in our industry.