Donkey jackets were an 80's trend. Worn for years by Miners up North, this was the only coat a lot of them owned.
They were either black or dark blue woollen mid length jackets with large plastic buttons and 2 big pockets up the front . The signature piece was the same colour plastic panelling across the shoulders.
These have recently come back into fashion with the likes of Paul Smith reviving the design. Although, they are much more expensive and possibly of better quality.