How do I stop the teeth creating an impression on the front of the garment’s fly panel?

Change the zip for reversed coil type zip and slider.

Why is the chain/teeth opening behind the slider?

Bottom stop should be protected with a bar tack to prevent direct strain on the zip. If bar tack is fitted but breakage still happens, check effective opening of the garment. Try garment on model or dummy to see possible causes of the breakage.

What are invisible zips?

Invisible zips, sometimes refered to as concealed zips, have a fold in the tape behind the sewn coil area so they can be sewn with a special sewing foot to give a hidden / invisible appearance to the teeth. The teeth are hidden from view. See Choosing the right zip and Do’s and Don’ts for […]