The DROPS Military Style Flannel Button Down Shirt in Olive from ASPESI, Italy.

Details
Boxy-cut shirt made of yarn-dyed cotton twill with a brushed finish. The model features a front button placket, a button-down collar, a patch breast pocket and a yoke with a yoke with central inverted pleat on the back.
The garment has a straight hem and is complete with side slits.
Loose fit.