apparently the system of fastening is apparently, if one could confirm, of much later centuries, my understanding that the earlier method being a loop and knot system, similar to hook-and-eye fastening.
but enough about history.i appear to have an issue with the fitting, npt being tailoredto my dimensions this isnt totally surprising or maybe this is normal for gambesons im not sure.
issues:
when flexing my arm, material bunches up ,limiting the amount one can flex,
when i raise my arms out from my sides it appears that the trunk of the gambeson is drawn up my body once my arms go above a certain angle from my side (arms at my side being 0, 90 being level with my shoulder) the angle being roughly 70-80 degrees,
how does one normally combat these sorts of issues,adding more materical to the armpit , would that allow one more freedom of movement?
ill be adding more via flickr, since my cameras generate huge photos, my lumix being about 1920 X 2560 pixels and my nokia X6's camera being nearly as huge. and requires drastic cropping to fit with the forums rules.

esford gambeson [ Download ]

my gambeson with arms raised level to shoulder, note how the armpit is taut. [ Download ]