For CFT's in the heat I have had an issue Lightweight Jacket (or is it a shirt!!) modified... For me anyway, the less clothes I wear on a tab the better So, like many people I wear the shirt... only diiference is mine has been modified with long zips under each armpit, allowing ventilation as required. Also the shirt has a drawstring bottom for keeping the heat in if it does turn chilly... I have had several positive comments on the design and was interested in progressing with it? Does anyone have any other mods they use and do they think there may be a market?