"Please be aware that when using AiryString® on fabrics with the following characteristics, there are concerns that the zipper may come unstitched, roll into the slider, or not be strong enough. ◇ Fabrics with notably low slippage resistance ( woven fabrics: fabrics with low thread counts, knitted fabrics: fabrics with loose tension). ◇ Fabrics with low friction resistance ◇ Fabrics with large bumps ◇ Shaggy fabrics"

Seems like the target use case is Athleisure?