Union infantry overcoat with shoulder cape and stand collar; made of new wool broadcloth, tightly woven in a plain weave, and heavily fulled (washed to prevent shrinkage and increase durability) with collar and brass buttons. This US Army Overcoat would have been produced sometime between 1851 and 1861. It has the name A.Harrison inside, which may be the name of the soldier that wore it, for at least part of its life in the US Civil War.
See Interactive Greatcoat