A jacket of warm material. Many of these things were supplied to soldiers in the Civil War.
1805. I got up, and found that my waumus was bloody, which I had not observed before.Dying Confession of Charles Cunningham: Lancaster (Pa.) Intelligencer, Nov. 12.
1854. He was attired with a red flannel wamus, a leathern belt girt around his waist, deer-skin leggins and moccasins, and a white felt hat that run up to a peak.H. H. Riley, Puddleford, p. 14 (N.Y.).