Hardcore Luxury® Best Wool in the Woods®

WeatherWool ShirtJac in pure wool merino Jacquard Fabric
WeatherWool ShirtJac in pure wool merino Jacquard Fabric
WeatherWool ShirtJac in pure wool merino Jacquard Fabric
WeatherWool ShirtJac in pure wool merino Jacquard Fabric
WeatherWool ShirtJac in pure wool merino Jacquard Fabric
WeatherWool American made Merino WeatherWool ShirtJac Wool, hunting, birding
WeatherWool ShirtJac in pure wool merino Jacquard Fabric
WeatherWool ShirtJac in pure wool merino Jacquard Fabric
CPO Shirt
CPO Shirt
WeatherWool Merino Jacquard Fabric Palette
CPO Shirt
CPO Shirt

CPO Shirt


PLEASE NOTE:  Until 17 January 2021, we’d called this product the “ShirtJac”  We’d had quite a few requests to make some changes, and the result is the item we used to call the “ShirtJac” is now renamed the “CPO Shirt” and we'll have a new product, called the ShirtJac. The new ShirtJac is more like a jacket than is the CPO Shirt.

Sorry ... we are completely sold out of what we now call the CPO Shirt.

    CPO Shirts are priced at $475 for sizes up to 2X. Size 3X, $495. If you need larger than 3X, please contact us directly. 

    If you are interested in a CPO Shirt please backorder at a price of 0, with no obligation. Please click for Production Status or a snapshot of our overall Inventory.

    Like the CPO (Chief Petty Officer) Navy Jacket that originated almost 100 years ago, our CPO Shirt is a Basic Shirt Design ... but our Fabric is not much like the Navy's except for the general idea of using wool. The CPO design has been widely appreciated for decades and became very popular in the late 60s and early 70s. It's never really disappeared, and for good reason ... it can be a jacket or a shirt, depending upon what you need, what else you wear and the Fabric from which it is made. The CPO Shirt is just an extremely versatile classic.

    Our CPO Shirt is, of course, made of our own Merino Jacquard Fabric, the softest tough Fabric anywhere (Hardcore Luxury®), and can be ordered in MidWeight and FullWeight versions. Please click for information about FullWeight vs MidWeight Fabric.

    • In our FullWeight Merino Jacquard Fabric, the CPO Shirt is perhaps more of a jacket than a shirt, and most people will not think about tucking
    • In our MidWeight Merino Jacquard Fabric, the CPO Shirt is definitely more shirt than jacket, and feels more natural tucked into the pants or worn under a Basic Vest
    • The rounded shirt tails are long enough to be tucked in, but people usually wear the tails outside, particularly with the FullWeight
    • Front chest pockets have modest bellows and button-down flaps; and are deep enough for a big phone
    • Collar is smaller than on the ShirtJac, it can be buttoned down or flipped up, and is substantial enough that if you fold it up you will notice the extra warmth around your neck
    • Above the cuff is a 4 inch opening secured by button offering good closure but also enabling the cuff to be comfortably folded up
    • The cuffs are secured by either of two buttons that enable adjustment. The adjustment is particularly useful when coordinating the cuffs with gloves, mittens or a base layer with a monkey-paw (thumbhole sleeve)
    • Sleeves cut long for better coverage and to let you pull your hands inside
    • Indestructible melamine Slot Buttons
    • There are neither hand warmer nor internal pockets
    • Cut long and generous 
    • FullWeight CPO Shirt in size Large weighs 3 lbs (1.36 kg)
    • MidWeight CPO Shirt in size Large weighs 2 lbs 6 oz (1.08 kg)

    Our CPO Shirt provides a great example of the versatility that we strive for. In January 2016, I spent a few days in Fairbanks, Alaska, making several presentations to United States Military. With a light wool base layer, the FullWeight CPO Shirt was comfortable at indoor temperatures of 70F/21C, and was good enough when we were outdoors in temps of -10F/-23C!

    Leo Grizzaffi, the outdoor writer, likes to wear his CPO Shirt instead of a sport jacket. Advisor Dave Canterbury put all of his instructors at The Pathfinder School (bushcraft and survival) in WeatherWool Lynx Pattern. At left is a selfie of Dave in his CPO Shirt.

    Offered in FullWeight Fabric in Solid Colors Black, Drab and Duff as well as Lynx Pattern.  Also offered in MidWeight Fabric in Solid Drab Color and in Lynx Pattern.

    Here is a review published by Explore Magazine and written by Kevin Callan, the magazine's field editor and a well-known tester of outdoor products. The review was written when the CPO Shirt was called the ShirtJac.

    And a neat comment sent to us by Bruce Carlson:  "Received my XL Lynx wool ShirtJac  [now called CPO Shirt] yesterday. Wore it to work today. 5-6 compliments….everyone wanted to 'touch' it!".


    Shirt Reviews (received in the days when it was called ShirtJac.  Sorry for confusion!)

    Details about WeatherWool Construction

    Care and Cleaning


    4 September 2021 --- Ralph and Denali