In reply to Timmd:
> I've found Quechua zips to fail after a year and a half or so by the way, I'm not impressed with the zips on Decathlon own brands so far.
This worried me a little, so I had a look at the zips on my recent Decathlon purchases, and they're all YKK coil zips (mostly 4C family), so about as reliable as the industry produces. Maybe you were unlucky, or maybe they've changed to YKK because of previous problems...