paratrooper version of the 21 boots didn't have a zipper from the first place, they just need to buy it instead of standard versionThe feedback loop is pretty quick these days. I'm sure they have an new model in development that takes into account these new issues. Type 19 to Type 21 was what? 2-3 years? That's not bad for the feedback to come in, and new adjustments are made. Compare this to the US Universal Camo Pattern, which stayed on from 2004-2019, even after complaints were coming in within the first 2 years.