For midlayers the high loft fleece works best I think. Thicker grid fleeces would be my second choice like this https://www.thenorthface.com/shop/mens-sds-½-zip-cua4.Good info thanks folks. I have 100% merino base top & bottoms. Just looking at what to get for the insulation layer.
Ever hear of fishnet baselayers? I haven't tried them yet but hear they're great in cold weather. Instead of wicking moisture away from the skin the more open netting let's the moisture evaporate off the skin and vent out the top. The shirt doesn't feel as wet and clammy that way and keeps you dry instead of feeling sweaty like a normal baselayer does. They just weird so not something you'd want to wear in public which is why it's not more popular.Powder dry gets saturated with sweat.
If you want a good, light, and vapor permeable base that is inexpensive get serki pcu level 1 that has 3% or so silver coated fibers in the material. Best that I have found and I have tried it all.
The serki comes in short bottoms (underwear), t shirt, long bottoms and quarter zip tops.....just do not dry it with high heat in a dryer.....I hang dry mine.
Yes most are breathable and I hike in with mine on if I'm not carrying a lot of weight like a stand and sticks for example. Some polartec fleeces aren't very breathable like their windpro or hardface fleece fabrics. When it's really cold I can't just wear a baselayer to walk in with I'll wear a fleece and if I sweat I'll change out my baselayer top when I get to my spot. That's about all you can do in some conditions.Aren’t most fleeces highly breathable? Or does polartec add some wind shear lining?
Almost all fabrics are breathable to a degree....most windproof fabrics are not breathable.Aren’t most fleeces highly breathable? Or does polartec add some wind shear lining?