Robster59
Tour Rookie
Fair enough. As I say, it's more a theory really based on the fact that the waterproof zips have much finer teeth than standard drips, to keep out the rain. As a result I would imagine they are less resilient than traditional zips. My Titelist StaDry trolley bag and my BagBoy S260 Stand bag both have these waterproof zips and I'm very careful about how much strain I put on them.I can categorically state that I never overpacked my Motocaddy dry series bag, and now all three of the front pocket zips have failed. (First bag was replaced under warranty, second one failed after about 15 months). I believe it's a combination of the way they are "welded" to the bag and the fact they have "corners". The stresses placed on them as they go round the "corner" breaks the "weld".
Saying that, the amount of money that the manufacturers charge for bags these days, you'd expect them to use top quality materials, especially for such crucial items.