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Base Layers


Patagonia Stretch Boxer Briefs
$30.00   $21.95
-27%
In stock
Patagonia
These stay-put stretch boxer briefs underwear are perfect for high-adrenaline and high-mileage activities. Specs: Our stretchiest... More

Patagonia Merino 1 Silkweight Crew
$65.00   $44.95
-31%
In stock
Patagonia
Our Merino 1 baselayer crew has a merino/polyester blend to keep you dry and comfortable in warm to hot conditions. Details: Merino... More

Patagonia Capilene 2 Crew
$45.00   $29.95
-33%
In stock
Patagonia
Ideal Uses: Running, Mountain Biking, Climbing, Trail Runs, Cross-country Skiing. Knit is open for maximum breathability and wicking performance yet... More

Patagonia Silkweight Boxer Briefs
$32.00   $21.95
-31%
In stock
Patagonia
Our tried-and-true boxer brief silhouette in a lightweight, supersilky polyester for all-day, next-to-skin comfort. Specs: Silkweight... More

Patagonia Capilene 2 Bottoms
$45.00   $29.95
-33%
In stock
Patagonia
  Made from an open-knit 4-oz 100% polyester (54% recycled) that breathes, wicks perspiration and dries in a flash, these bottoms are warm and... More

Patagonia Capilene 2 Lightweight Zip-Neck
$49.00   $34.95
-29%
In stock
Patagonia
Patagonia Capilene 2 is an excellent quick drying performance base layer with a zip neck for convenient venting. Buy it at Second Ascent now.  Our... More

Patagonia Capilene 3 Crew
$49.00   $34.95
-29%
In stock
Patagonia
Ideal Uses: Backcountry Skiing and Snowboarding, Mountaineering, Trail Running, Rafting and Kayaking, and Trekking. Offset underarm panels and... More

Patagonia Capilene 3 Bottoms
$49.00   $34.95
-29%
In stock
Patagonia
Ideal Uses: Nordic Skiing, Ice, Mixed & Alpine Climbing, Expedition Climbing, and Backpacking and Ski Touring. 100% polyester (64%... More

Patagonia Capilene 3 Zip Neck
$59.00   $39.95
-32%
In stock
Patagonia
Ideal Uses: Nordic Skiing, Backcountry Skiing and Snowboarding, Mountaineering, Trail Running, and Rafting and Kayaking. Knit is open for maximum... More

Mountain Hardwear Micro Power Stretch Full Length Tight
$70.00   $42.95
-39%
In stock
Mountain Hardwear
Micro Power Stretch provides exceptional moisture management, warmth and durable stretch.  Smooth outer weave slides easily under layers and brushed... More