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Drab Green in sizes 3X and 4X are the only ones available now. I don't see more MidWeight Fabric until 2027. BUT we do have a lot of Denim CPOs ...

Please click here for the Denim CPO, which is of similar design but made with our own 100% Wool Denim Fabric. All our Fabrics are made from the same fiber, but the Jacquard and Denim weaving techniques are very different.

DESCRIPTION: The classic CPO (Chief Petty Officer) Shirt originated almost 100 years ago, and has been widely appreciated ever since. It’s a jacket or a shirt, depending on what you need and what else you wear. Our CPO is an extremely versatile piece in a basic, historical design.

FIT GUIDE: Fitted - cut closer to the body with minimal room for layering, but you can still wear a flannel shirt, thinner sweater, or lighter wool shirt with decent mobility.

SIZE CHART: PLEASE check the size charts and let's hope we can get it right the first time ... exchanges/returns are free but a chore for you and an extra cost for us.

FABRIC: 100% WeatherWool Certified Fine Wool in our MidWeight Jacquard Fabric

WeatherWool is always MADE IN USA 100%

FEATURES:

Signature slot button closures secured with nylon ribbon on cuffs, at the pockets, and front center
Milspec water-resistant thread throughout
Two external chest pockets

VERSATILITY: The CPO is typically a 2nd layer but often a 3rd layer and is sometimes worn as a mid-layer or even a base-layer. Some people will tuck the CPO into their Pants. Our Fabric is comfortable enough that the CPO can be worn over a short-sleeve base-layer or even as a base-layer, particularly on warmer, rainy days.

Our MidWeight Jacquard fabric is designed with breathabilty and activity in mind. Our FullWeight or multipal layers of MidWeight is wear warmth starts to stack warm air in.

ANECDOTES: WeatherWool Advisor Leo Grizzaffi (last photo), the outdoor writer, likes to wear his CPO Shirt instead of a sport jacket.

And a neat comment sent to us by customer Bruce Carlson: "Received my XL Lynx [CPO Shirt] yesterday. Wore it to work today. 5-6 compliments … everyone wanted to 'touch' it!". People wanting to "touch it" is something we hear often about Lynx Pattern.

OUT OF STOCK ITEMS: If your choice is out of stock, you have three optional next moves outside of picking something else.   

The best way to keep in touch with our production schedule is our NEWSLETTER. Sign up, and you'll always be up to date with what's coming down the pipeline.  

If it's only this one product you are interested in, click NOTIFY in the cart section, and we’ll get in touch before the next run.

  If the timeline isn't a concern and you know you absolutely want this exact item, place a Ship ASAP reservation for the next production. This guarantees you are locked in at the price, but please understand production timelines range anywhere up to years (wish that was not the case!). 

CARE AND CLEANING: Wool’s anti-static properties help make it self-cleaning and odor-resistant, so it should not need frequent washing. It may not even need rare washing. If your wool does not seem dirty, don't feel obligated to clean it ... even if you have not cleaned it for years. More details about spot cleaning and submersion washing can be found on our care and cleaning page.

Quality Control Steps for the CPO

MidWeight CPO, walking in light rain, temp of 66F/19C, without a base layer ... a day when the MidWeight CPO was better than anything else I can think of ... with no base layer at all!

Page updated - 16 July 2026 --- Cody

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