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Move over down and polyfil, and make room for the new kid in town. The SmartWool Men's PhD SmartLoft Divide Full-Zip Top maximizes the versatility of merino wool to keep you warm from your first fall hike through your last spring ski trip. Wear this zip-up as a super-heavyweight baselayer when you're climbing in extreme conditions or wear it by itself at the tail of April showers, and let the DWR-treated front panel shield you from wind and light drizzle. Behind that nylon, SmartLoft insulation keeps your core warm with its proprietary combination of wool and polyester that regulates your temperatures better than all-synthetic insulation and, unlike wool, keeps warming when it's wet. On the arms, sides, and back, a double layer of merino wool jersey offers intelligent protectino from the elements when you're working hard. Lined entirely with soft merino wool, this jacket won't leave you an itchy wreck if you're only wearing a tank top underneath.

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Super comfy!!!

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

Looks great, feels great, washes fast in cold water, stays firm , keeps warm and dry or cool and dry depending on weather. Fantastic peace of garment. Smart people buy SmartWool !!! That's a pretty catchy phrase!!!

My New Favorite Mid Layer

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

I recently bought the SmartLoft Divide because I tend to overheat when exercising in full synthetic jackets. So far I've been really impressed with the material quality, comfort and breathability of the Divide. It does not itch at all, breathes extremely well and has just the right amount of insulation in the right places. I've ended up wearing it as an outer shell on dry fall days and under an outer shell on colder/wetter days as wind tends to cut through the sleeves.

The Marmot Variant Jacket is a good alternative, but the fact that the back and sleeve material is synthetic (Polartec Power Stretch), not wool make it slightly warmer, but much less breathable. If you're looking for a jacket that's designed to be warn as more of a hybrid outer layer, I'd opt for the Patagonia Nano Puff Hybrid instead. That said, for a super versatile mid-layer, it's tough to beat the SmartWool Divide.

I'm 6'3" 195 and usually wear Large - this fits slim but true to size.