Obrien Armor Spectra 80ft Wakeboard Line 2010: Let’s face it; wakeboarding without a rope is slightly difficult. If you’re in the market for a high end mainline, stop your search now and pick up the Obrien Armor Spectra 80ft Wakeboard Line. Made with Spectra, the material that is 10 times stronger than steel and zero stretch makes this a must have for any wakeboard rider.