A company called ornot makes an alpha vest. Naked on the back, some light wind proofing on the front. I think 125gsm. It’s a great piece—perfect for running in the teens/twenties when there is a bit of a wind. Would be nice with a pack. Super lightweight—like 4 ounces? Only problem: no pockets since it’s a cycling piece.I've been using a vest more this winter. I have a Sitka Mountain vest (discontinued) that I've been layering over my MDWi (military version of the Ambient Hoody, basically identical) and a light base layer. I've been doing this when the temps are in the low teens to low 20's and there is some wind (not a $hit ton of wind though as my arms would likely get too cold). It's worked pretty well, but other than day hunts, probably not much chance of incorporating it while hunting.
The other vest I've been using is a Montbell Chameece vest—a very light "traditional" fleece. I've been using it under the MDWi and over my base layer when temps drop into the 0-single digits (and not much wind). This has worked pretty well too, but not sure if I'd use it during hunting season either.
I recently picked up an Ambient vest that I think could see some use during hunting season. Early season combined with a base layer and windshirt and possibly very frigid conditions late season used in combination with the MDWi when moving more slowly.
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