Mine is about five years old and I've used it for wood chopping, construction, you name it. I've torn it and fixed it a number of times including at the neck when I tried to take it of while wearing ear defenders (like a dick). So I couldn't tell you I'm afraid.
Nice! Sounds like there is no reason to worry… Worst case I bring it in to get tied off, otherwise can be repaired to the extent I abuse the thing. Thanks for the responses on this