“The Highline's inner core, and the loop that secures the tether to your jacket, are both made from the same kevlar material that goes into bulletproof vests, so they can withstand up to 30 pounds of pressure before breaking. It might sound like overkill, until the day it saves your phone's ass and you're happy they went with the good stuff.” Gizmodo, Kevlar Tether Keeps Your iPhone From Plummeting To Its Death
