No seams on the top of the shoulders: prevents water from penetrating.
Slightly extended back.
The dark contrast is placed where the clothing is most exposed to dirt.
Elastic in the arm hole keeps warmth from escaping.
More info
Light fabric. Two-toned. High collar. Elastic in arm hole. Fastening with zip and storm flap with press studs. Chest pockets with flap and press studs. D-ring. Front pockets. Inner pocket. Waist with press stud adjustment. Contrast stitching.