Tactical turtlenecks

For diverse and sundry reasons I’ll soon need some long sleeve shirt action. This is code for my employer is moving to polos, and I work in the coldest corner of Tartarus.
So. Turtlenecks.
Of course, I go looking online for thermal shirts, and they all looked like crap, and I hate changing my clothes at work, and summer.
Thinking black knit, mock neck length, super fine silver zipper. Left breast pocket, maybe a sleeve slit as well. Racing stripe sleeves with hollow fabric tube seam covers to reduce irritation and give Tim for wiring. You know. Tactical.