A heavyweight thermal undershirt from Caldero Industrial, the kind that's been the standard-issue underlayer for dock workers and warehouse crews across the Lakes corridor for forty years. Waffle-knit synth-cotton in faded brick red or charcoal grey, with flat-felled seams that won't dig into skin under a harness or safety vest. The collar is a low crew that doesn't bunch under a jacket. Reinforced at the elbows and the lower back where workers bend and strain. It smells faintly of the industrial washing process when new, and after a few cycles it softens into something almost pleasant.

Caldero doesn't market this shirt. It doesn't need to. It shows up in every supply locker in every cold-floor facility from Shelf level to the mid-stacks. Tier 2 workers buy it three at a time. Tier 1 residents find it secondhand, cut the sleeves off, patch the holes. It's the kind of garment that outlives its owner's job.