I will be honest with you. I really didn’t know what a CPO shirt was. I kinda knew what they looked like, but that was about it. I couldn’t for instance tell you the difference between a CPO and a shirt jacket. Not only did I not know that much about the origin of CPO shirts. I wasn’t a big fan either.
Now I do know a little about the CPO shirt. The CPO shirt was developed by the Navy in the 1930s as a layering piece for cold-weather work. While CPO stands for Chief Petty Officer these shirt-jackets were not widely worn throughout the Navy. While most of my CPO shirts are chamois the originals were wool-flannel. The original also had a single scalloped flap pocket on the breast, but there have been multiple iterations of the CPO shirt with the double front pocket being the most common.
Like most things trad and ivy these shirts became popular post WWII. I am not saying that they were not a popular during the heyday,but I always associate them with late 70’s/early 80’s rugged prep look similar to 60/40 parkas. This could be because I can remember that era and was not around for the heyday.
You can count me as a fan of the CPO shirt these days. I have learned the value of the CPO shirt this past year. I now have 4 different CPO shirts. I have a red chamois version from J.Crew, a vintage navy wool-cotton one from Brooks Brothers (with a button-down collar), a navy chamois from Woolrich, and natural colored chamois from J.Crew.
My current favorite is the vintage Brooks shirt and it even got its own blog post. It is a lot thinner than my others but being a wool blend it offers a great warmth to weight ratio. However I love them all and each has there time and place.
I wear CPO shirts pretty frequently now. How do I wear them? I like to wear them over a tucked in OCBD on casual Friday. On a Saturday or Sunday I might just throw it over a tee or a henley. Sometimes I wear them buttoned but most of the time I don’t. They have been great for me during the winter adding a layer of warmth while offering up a little texture and color. Its also nice to have mid-layer option other than sweaters and sweatshirts. And as to what is the difference between most shirt jackets and CPO shirts? The answer is nothing.