The US Navy Peacoat was adopted during the early 20th Century, from Britain’s Royal Navy Reefer Jacket. The Royal Navies first regulations for uniforms for other ranks were issued in 1857, a century after the regulations for officers and this garment was originally used by Midshipmen ( Reefers ). These crewmen had to climb the rigging and furl and unfurl, or ‘reef’, the sails of the sailing ships of the era. The jacket was short, to allow ease of movement through the rigging. It had a double-breasted front, which displaced the buttons to each side. This helped reduce the chance of them getting caught on ropes, as the wearer maneuvered the sails. The pockets were often close to vertical, and over the flanks, rather than horizontal and at wrist level. It was made of a very heavy wool, in dark Navy blue, with a nap on the face side.