I'm trying to find the ideal mid layer for...
I'm trying to find the ideal mid layer for cold backcountry ski trips. Last year I bought a Montbell Thermawrap Guide, but with my Mountain Hardware conduit shell and thin poly base-layer, I'm sweating out the insulation. Example, three weeks ago I went on a simple 3 hour hike. Temps were 10 degF with about 30 mph winds. I had to bundle up pretty good, but at the end of the hike, I was freezing cold to discover my layers were completly sweated out. Therefore, I think the Thermawrap is just too warm to wear with a shell, but I desire a shell to protect the fragile shoft shells from damage in the backcountry and provide some water protection.
I also consider a hood a requirement for both additional confort if needed and also in case of emergencies, always good to have extra head protection.
Reading these other reviews leads me to believe the nano puff is also going to be too warm for my needs. When I compare the insulation between the nano and the thermawrap however, the Thermawrap has more than twice the insulation as the nano, which leads me to believe the nano is not as warm as the thermawrap, which is what I think I need.
I'm not super familiar with the Thermalwrap Guide, but just looking at it on the site here, it's quite a bit warmer than a Nano Puff. It's got 150 grams of insulation vs 60 in a Nano. A Nano won't necessarily breathe, but I think it will be more comfortable than the thermalwrap. A couple more options to consider would be the Nano Puff Hybrid, or an R1 hoody combined with a Nano vest. The Nano Hybrid combines an R2 fleece and a Nano - R2 is a lofty fleece that breathes well and handles moisture well, but still insulates. With the Hybrid you would have the added warmth of the Nano sections, but still breathability in R2 sections. OR, the R1 is my skiing midlayer of choice. If you got that, and then had a Nano vest to toss on when it's really cold I think you could handle some pretty chilly temps.