From Grainline Studio:
The Cascade Duffle Coat is a fresh take on a classic shape featuring a slight A-line cut, toggle front closure, and a hidden zipper band to keep the coat shut tight against cold weather. The hem of View A hits at the hip while View B falls to mid-thigh. Although View A is shown with a collar and View B with a hood, both are interchangeable allowing you to create your own perfect coat.
Techniques involved include sewing a straight seam, setting sleeves, attaching a collar or hood, and inserting a lining.