On those brutally cold days, this is the only way to go
A day ender for me is the feeling of sitting on the chairlift on a brutally cold day, and feeling my body heat escape out of my shoulders and knees. You know the feeling. So last year, I upgraded my base layers to the insulated TDS Riding Crew and bottom -- SOOOOO GOOOOD.
I'm 6 feet tall and slim, and the large top fit nice and long on my lanky torso and arms. The targeted, low bulk insulation panels really pack a ton of heating power! And there's no insulation in places where you get hot like armpits, and stomach, etc. I wear slim outerwear and I don't have too much room under my jacket, so this was the way to go for me. It's a little pricey, but you'll be thanking yourself while comfortably kickin it on the chair this winter.