The zip on my Apeks WTX-D wing gave way, couple of teeth at the top are broken hence the zip if knackered. The inside bladder is exposed and I am sure it is unsafe to use as it is. Contacted Apeks early this week. Response was: it is not a warranty issues, we don't repair them, can't do much about it.
Any ideas on how to fix it before I stump the cash for a new (non Apeks) wing.