Be careful! Anytime with zippers with shrinkable fabric if you expose it to heat it can and most likely will create the 'wavey zipper'. Like when you wash and dry a zip up hoodie and the belly pokes out bc of the zipper. What happens is the fabric shrinks but zippers do not so it forms that wave. Is tailoring out of the question? I'd hate for it to get messed up for you, just tryin to help as i only know by making that mistake luckily with nothing as nice as JE though
This is true, it was also fade the fabric. You wouldn't have to worry with the heather grey, but the black will suffer.