Ask the MSA direct like I did and you will get a confused answer, in fact it transpires as I understand it, that that those expensive suits you see F1 teams and the like wearing are in fact embroidered on the outer skin before the suit is finally assembled and thats expensive I bet. I do believe that you cannot punture the suit entirely even with fire resistant thread and I can assure there is no other way of embroidering and assembled garment without doing this.
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