Yes at 288, I agree that is on the extremely Low Poly count side.
Time for a wireframe view.
For best calculations, the clothing mesh should have the +/- the same poly density as the underlying figure.

A few 1.000 for a Jacket.

show a wireframe.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!