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When you start a long hike in the early-morning chill but you know you'll be coming down the mountain under a hot afternoon sun, wear the Patagonia Men's Merino 2 Lightweight Crew. This long-sleeve baselayer regulates your body temperature—it warms you in the morning and helps keep you cool in the afternoon. It's soft to the touch and doesn't bulk up when you put your backpack on, and it stays dry so you don't have funky sweat stains from your pack.

  • Merino wool is soft to the touch, breathes freely, regulates body temperature, and naturally controls odor while polyester wicks moisture and is extremely durable
  • Slim fit allows you to slide layers over this easily without have to readjust clothes afterward
  • Side seams prevent bulking and uncomfortable rubbing and chafing
  • Raglan sleeves eliminates irritation when worn with a backpack

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Here's what others have to say...


Great Base Layer

  • Familiarity:I've used it several times
  • Fit:True to size
  • Height: 5'11"
    Weight: 162 lbs
    Size Purchased: Medium

Very comfortable. Slim fit perfect for my size. Used successfully for camping / long hikes several times. Dries quickly with minimal odor. Initially uneasy for not being 100% merino but haven't noticed issues yet.


Great base layer

  • Familiarity:I've used it several times
  • Fit:True to size

Very comfortable base layer. I wear it for everything from skiing to working out to around the house-work.


Warm and stretchy.

  • Familiarity:I've put it through the wringer
  • Fit:True to size

This top works great for a walk to the store and layering up. Very durable.


Layer For Skiing

    I bought the Merino 1 this spring as a base layer for skiing. I liked it so much that I picked up this one for when it's a little colder. It also means I can do laundry half as often!


    Best in wet weather

    • Familiarity:I've put it through the wringer
    • Fit:True to size

    I have a 10 different sets of base layers from Patagonia, both in Capilene and Merino, and love them each for different reasons. While the Capilene has a nice soft feel and good warmth, the Merino is what I pack when going flyfishing. Overall, it is lighter for the same warmth value and doesn't turn into a slow-to-dry, clingy, rubber-feeling wetsuit like Capilene does (and all other brand synthetic base layers) if I slip and get dunked while wading. I prefer sleeping in Capilene for some reason, but for doing anything where I could end up soaked, I use the Merino.