US Issue Light Weight Gen III Cold Weather Undershirt by Polartec/Milliken, now available from Central Alberta Military Outlet.
Gen III ECWCS Level I: Lightweight Undershirt and Drawers - CIE Hub
US Military GEN III Cold Weather Mid-Weight Shirt - ECWCS Level 2
Gen III ECWCS Level I: Lightweight Undershirt and Drawers - CIE Hub
Polartec Military Issue Gen III ECWCS Level III High Loft Jacket
SET of US Army Large Regular Silks Gen III Level 1 Cold Weather
Polartec Military Issue Gen III ECWCS Level II Grid Knit Pants
Polartec GEN III ECWCS USA Level 1
Gen III ECWCS Level I: Lightweight Undershirt and Drawers - CIE Hub
Extended Cold Weather Clothing System - Wikipedia