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Move over, down and polyfil—the SmartWool PhD SmartLoft Divide Full-Zip Top maximizes the versatility of merino wool to keep you warm in brutally cold weather. Wear this zip-up as a heavyweight baselayer when you're skiing or climbing in extreme conditions. Or, wear it by itself and let the DWR-treated front panel shield you from wind and light snow. Either way, this versatile layer capitalizes on a smart mixture of wool and synthetic fibers to ensure maximum performance in a wide range of conditions.

  • DWR-treated nylon chest panel protects you from full-frontal weather assaults
  • Packable SmartLoft wool insulation inside the chest panel traps body heat around your core
  • MerinoMax back and side panels use a touch of elastane to keep you mobile
  • Pure merino wool lining offers next-to-skin comfort while it helps your body regulate its temperature
  • The natural anti-microbial properties of merino wool help keep this heavyweight baselayer fresh between washings
  • Semi-form fit is great for layering without being too skintight for solo wear
  • Low-profile inseam thumbholes stop cold air and snow from moving up your sleeves and make it easy to layer over the top
  • Asymmetrical zippered chest pocket safely stores your beacon, and it has a cord port for your media player
  • Easy-care design means this zip-up can go straight through your washer and dryer

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SmartWool PhD SmartLoft Divide Full-Zip Top - Men's

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Here's what others have to say...

3 5

BD Rhay

Member since 
  • Gender: Male
  • Familiarity: I returned this product before using it

Didn't have the same material thru the front and back. Other pieces in this category had a more consistent look and feel. I returned in favor of a Mammut jacket that was less expensive and more consistent.

5 5

Zach Branson

Member since 
  • Gender: Male
  • Familiarity: I've used it several times

I picked this up a couple of weeks ago and have found myself wearing it everyday. The weight is perfect for a cool fall day and with the wool it tends to have a much broader temp range than the synthetic piece it is replacing. Also pleased with how well it layered up when we had a colder than normal day and I needed to through a jacket over it - new favorite!