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I have used quite a few different brands and fabrics, and as others have said, I keep coming back to capilene from Patagonia. While other fabrics may do something better, capilene fabric does everything a base layer is suppose to do as well as any, better than most.
Wool is a fine insulator until water is infused into the equation like controlling the micro climate around a working body. A hard working bodies micro climate can have more body vapor than wool can push and dry itself which can not control the micro climate for comfort.
Polypropylene works OK with its hydro hating properties but this is where it fails, the fabric does not remove body vapor from around the body but does have some insulating properties when wet.
You can go down to Wally World, Cabelas, Sportmans, etc and pick up inexpensive polypro or EWCS that will do just fine as a base layer. But, if you plan to work the body hard in different climates and want the micro around your body to perform at its peak, you might want to drop the coin on capilene.
good luck
How much activity?
Wool is a fine insulator until water is infused into the equation like controlling the micro climate around a working body. A hard working bodies micro climate can have more body vapor than wool can push and dry itself which can not control the micro climate for comfort.
good luck
This is for sitting in a blind
Merino wool actually expels moisture better than any synthetic on the market today. Because it expels moisture so quickly, it doesn't have time to grow bacteria. Net result is that I've done five day trips of heavy hunting in our gear, come home, and there is literally zero odor, even in the arm pits. On top of this, in a rain situation, Merino retains it's thermal regulatory properties even when totally soaked, just like Capilene. Can't say the same about UA, etc.
I was a capilene guy growing up but you can't tell me that stuff doesn't turn stinky in a hurry.
I have never used Patagonia but I have read some of 45.308's posts and he definitely knows his stuff and has used a lot more gear than I have.
I have used a lot of different layers over the years and the poly layers are not for me, I prefer merino wool base layer and socks for winter time. I am one of those guys that builds heat and sweats so I do not use heavy layers. The major problem that I have faced is sweating and soaking the base layer, then it almost never drys out. I do not have that problem with the merino layers. They dry well and wick moisture away from the body so you don't get that sheet of ice feel on your skin. I would recommend having a good head cover or bavaclava to keep the heat in while sitting, especially since it's going to be extended periods of time. I have never used First Lite but my brother in law is a guide and he swears by it and Sitka gear both.
I use a Patagonia base layer up in the Colorado mountains. My camelback tube froze, but I was good to go. Got the Patagonia tip from member 45.308 Search his threads he has some informative cold weather gear tips and info.
Wool is itchy do to barbs in the fiber. Several methods to remove the barbs; chemical or freeze and smash were the most used but who knows these days.
Stink, not sure why or how this effects performance. Its all about controlling the bodies micro climate. A couple minutes from the rig, out for a day from a lodge or cabin, anything to include a wal mart sweat shirt will do ok.
Opinions or experiences vary but a half half of Capilene and merino wool worn over a season, there is no comparison at which dries fastest or maintains the bodies core.
I have no desire to start an argument nor pissing match, as you are clearly an informed dude and probably have more experience than the rest of us combined. That said, it sounds to me like you've never tried truly high end Merino wool. I'm not going to name names but none of the big Merino brands you probably know use that tier of merino, and most are blends. Our base layers are as soft as cotton with no itch. And I can't tell you how many emails we get from customers who are capilene converts. Hell, I'd be happy to get you a deep discount if you're interested just to hear your opinion. This ain't your granddaddy's Merino!
Regarding the Stink: Sort of a chicken/egg deal there. High grade Merino doesn't stink because it evacuates moisture before it has time to form bacteria (or get you into hypothermia trouble). Hence, the dual benefit of thermal regulation and no stink for hunting.
Whats your guys take on bottoms? Ive got a goruck coming up and cold and wet and heavy activity are DEFINETLY part of the equation. Ive got a merino wool top that i plan on using with a poly tshirt and a softshell in my pack in a drysack. Bottoms though im not sure. Im thinking underarmour undies with bag balm for the anti-chafe, then a thermal layeer plus some kind of quick-drying long pants and wool socks. Thoughts?
Then I would suggest close to a 7oz weight, something like ECWCS base layer, cost effective and warm.
For stand hunting I use Cabelas ECWCS polar weight Cabela's E.C.W.C.S. Military Polartec® Power Dry Polar-Weight Zip T-Neck – Regular : Cabela's
For active I use Under Armor cold gear
Well, getting cold now. Not terribly, but I've had some time to compile some of my own observations. Not extreme cold at all, but I've been doing some work outside, then jumping back in a vehicle to go someplace and get out and do some more work. As a result, I think I am beginning to understand what microclimate is about.
First, boy, yes, the merino does cut down on the retention of stink. While this is mostly cosmetic, it is a nice feature.
I haven't pulled out much of my older base layers at all this year as it seems like I'm liking what merino and capilene do better. The standard base layers, be they the expensive UA or even inexpensive stuff from Walmart seemed to pull of perspiration pretty well, but so well that it usually left my skin almost a little cool to the touch. Some cotton days, well, there was often damp to wet feelings, and, as long as you stay warm, you don't get cold. I see that this could be a huge problem if things started to go bad as one would get cold, dangerously.
Merino. Most of what I've tried has been super comfortable. Really enjoyed it compared to what I had used before. Again, no stink for extended use is nice, but it is cosmetic. I did recognize that I was getting warm enough to sweat, and that was absorbed into the merino fabric. Mostly, it would remain there, an amount of wetness during my work and then overnight sleeping. Sometimes, my temperature seemed to cycle...I'd get a little too warm, then cool down almost a little too much. That seemed to trigger sweating on the heat "peak" and then a crash into a short chill "valley". Seemed very apparent to me.
Capilene. Stuff is almost ridiculously light. I'm going to test this with my kids, but I found that I could pick up a shirt made of capilene material that was cold, put it on, and, in a matter of just a few seconds, it felt like it was my body temperature. I want to test this with my kids, and I don't necessarily trust my "butt-thermometer" on this...however, I keep recognizing this as something different from other fabrics. Using the capilene in my similar work situation, I did recognize the cycling, but I have no recognition of these being peaks of valleys. There was a little change that I noticed, but it wasn't something that required me to unzip my outershell trying to manage my release of heat and then to conserve my heat. I think this is my recognition of microclimate.
Ah, let me tell you sensei...Well done grasshopper!
What was your mid and outer layers?
Neat how I think I recognize that that actually works in the real world in a way that I can notice a difference.Capilene is a bi component polyester, next to the skin layer and the outer layer all with capillary action hence the name. The next to the skin layer is dry and warms up while the outer layer holds the wet and coolness.
For stand hunting I use Cabelas ECWCS polar weight Cabela's E.C.W.C.S. Military Polartec® Power Dry Polar-Weight Zip T-Neck – Regular : Cabela's
For active I use Under Armor cold gear