Originally Posted by SnowRock

I run kind of warm but at Stowe two weeks ago with high temps at the base at 0 and -9 up top:

• Tech or capilene tee
• EMS t3 baselayer mid-zip
• Patagonia Nano Puff Vest
• TNF Shell
• t3 base layer on the bottom and sometimes an extra set of tech shorts underneath
• Pants (mt. hardware)
• Mittens w. fleece liners (OR)

I basically use a combo like this with a different level baselayer depending upon how cold. Sometimes I go fleece vest versus nano puff, and I have a puff mid-layer jacket but tried wearing it once and it was too warm.