Hi do you remember where you got your fabric/ the name of the fabric?I ended up checking it out. I brought along a swatch of the fabric I bought for the flight suit and I'm REALLY happy with the comparison. Turns out the real thing is a twill weave, not poplin as I expected. And while the color looks slightly different in the picture, they looked exactly the same in person.
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So that's exciting. I can also confirm that the top straps on the Reeboks were definitely cut short with probably scissors, as was the assumption.