I weigh 205 and can lift myself out of the seat with one handle. So PRACTICALLY unbreakable. A single strand has 550 lb breaking strength. When woven it multiplies. They'll get the job done hahaI have never considered 550 cord unbreakable. Lol.
Only as strong as the weakest link which is 1 strand at the connection point. 550lbs. Take 225lb guy and apply full death grip and hard cornering. It may still brake.
But it probably is stronger than the plastic it replaces.