The Arma Jacket is Adsum's second fully waterproof jacket design, a sibling of Marsu Jacket. Two types of three layer fabrics are used. A more abrasion resistant fabric sits on the shoulder, waist panel, and sleeve areas; where you might find yourself rubbing things. Internal features of the jacket include large hard wearing mesh pockets instead of being backed with self fabric. This allows for things to dry out while rain or snow can be pounding the exterior of the jacket. An internal hood cinch system keeps the throat area of the jacket a little more aesthetically tidy from the outside of the jacket. The fit of the jacket is classic.