Patagonia Merino 3 Midweight Crew

1 review
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4-star:   1
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Weight 9.8 oz / 278 g
Fabric 6.5 oz / 220 g 80% Chlorine-Free Merino Wool / 20% All-Recycled Polyester



This is a midweight merino wool/polyester blend base…

Rating: rated 4.5 of 5 stars
Source: bought it new
Price Paid: $40 on sale

This is a midweight merino wool/polyester blend base layer that Patagonia just reintroduced (yet inexplicably but happily put in the 50% off bin!). Patagonia says it is a "3" on their base layer scale, "1" being very lightweight and "4" being cold weather/expedition weight.  This one has a crew neck.

I have previously used merino wool base layers from Patagonia, Smartwool, and Icebreaker.  All of those other merino wool base layers are 100% wool; this one is 80% merino, 20% polyester.   

The shirt is fairly close-fitting, which makes sense for wearing it as a base layer.  it is soft, stretchy, and not itchy, consistent with other merino wool shirts i have worn.  the body of the shirt is on the long side, so it doesn't tend to untuck or ride up. 

Also, the stitching through the shoulders is flat and placed in such a way that the seams don't fall directly underneath shoulder straps.  the polyester imparts a little more firmness to the fabric, so it does not stretch out of shape the same way that 100% wool tends to do. 

While it is too early to tell, I expect the added polyester to give the fabric more strength and resistance from tearing, and the polyester might contribute somewhat to odor issues.  it is my experience with 100% merino base layers to date is that independent of brand, they are more prone to sustaining rips and holes than synthetic base layers, and less likely to smell bad.      

I have already worn the shirt a number of times either alone or under a nylon wind shirt, soft shell, or waterproof/breathable shell during hikes this winter.  it is definitely a cool weather shirt, too much insulating value for most summer and many shoulder season days in the mid-atlantic.  so far, I have been uniformly happy with the shirt's warmth, fit and comfort level.  it seems to handle moisture similar to other wool base layers i have worn, and so far, it has resisted the synthetic base layer stink that is one advantage of using wool. 

One small side note - the shirt has 'thumb loops' at each cuff.  i guess these might help someone keep the sleeves from riding up if wearing another form-fitting layer over it, eg powerstretch fleece, but the loops are an odd addition i haven't seen in a base layer before.

Where to Buy

Manufacturer's Description

Visit Patagonia's Merino 3 Midweight Crew page.

Retailers' Descriptions

Here's what other sites are saying:

Stay warm and comfortable in cool-to-cold conditions in this Patagonia Merino 3 Midweight Crew, which is made of 77% merino wool/18% Capilene fiber/5% spandex blend.


The grippiest time to boulder at the Buttermilks is also the chilliest. To keep your feet sticking to the smears and your body warm and flexible, slide into a Merino 3 Midweight Crew. Our go-to cool weather merino baselayer, Merino 3 helps you stay dry and comfortable during active pursuits. It's wonderfully soft, has a great warmth-to-weight ratio, naturally breathes and resists odor, stretches and regulates body temperature. We get our merino from non-mulesed Australian merino sheep, and slow wash it for softness and shrink-resistance without the use of environmentally harmful chlorine. Recycled polyester (20%) increases durability, resilience and moisture management. Details include a raglan shoulder design and underarm panels for mobility, offset seams for pack-strap compatibility and hidden thumb loops. Machine wash cold; machine dry at low temperatures. Fabric is bluesign(R) approved.


When most people think it's getting too cold to climb and hike in the mountains, you can slide on the Patagonia Men's Merino 3 Midweight Crew and keep playing. This baselayer is warm and soft to the touch, breathes freely, and regulates your body temperature in case you get too warm or too cold. When the snow drops, just slip a shell (or an insulated shell) over top and grab your skis or snowboard.


Free Shipping. Patagonia Men's Merino 3 MW Crew FEATURES of the Patagonia Men's Merino 3 MW Crew Fine merino wool responsibly sourced from the grasslands of Patagonia and blended with Capilene polyester for improved wicking, durability and dry time 18.9 micron-gauge yarn; jersey-knit construction Raglan shoulder seams are offset to minimize chafing under layers and packs Underarm panels with offset seams maximize range of motion and comfort Hidden thumb loops on cuffs help to protect hands Slow-washed without chlorine to prevent shrinkage bluesign approved fabric Machine-wash cold, tumble dry at low temperature SPECIFICATIONS of the Patagonia Men's Merino 3 MW Crew Slim fit Weight: 9.4 oz / 267 g 6.5-oz / (220-g) 80% chlorine-free merino wool 20% polyester (100% recycled) This product can only be shipped within the United States. Please don't hate us.

- Moosejaw