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If you've ever had call to stand around in wet windy winters, you may well appreciate having a good base-layer. These are the Platatac Microfleece Sniper Pants.
Cut generously from a 100 wt Microfleece, with an elasticised waistband that at small size sits at 26" relaxed and 51" fully expanded, and all the way up to 38" and 81" fully expanded in the XL size. These are currently offered in khaki and black, although I have a set in dark green from the early runs as well.
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The elastic waistband isn't really there to do anything more than keep them on your hips, but does so admirably, and I've not had any problems with it digging n, even with a battle belt or pack strap around my waist, over pants in my low key adventuring. They are the perfect companion to the Platatac Half-zip Microfleece tops too.
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One thing to note though. Microfleese does not wick. These get sweaty and slick if you build up some heat, and can be uncomfortably steamy as a result in some situations. This is especially important if you're expecting to be out where you might re-chill.
They are quick drying though, which is one reason I choose to wear them when I'm out kayaking.
I don't mind getting wet, but no one wants to stay wet. Especially in the cold.
If you find yourself in the market for a light, warm set of underlayer bottoms, you might do well to keep something like these in mind. If you find yourself laying prone, still and running silent whilst stalking prey or providing overwatch, you might well want to add a little comfort to your operation.