Polartec ‘s patented bi-component Power Grid construction is used in the Military ECWCS Level 2 Base Layers. Our Polartec? Power Grid? Balaclava offers more comfort and warmth. Goggle cut facemask has an extended body length to keep you covered at all times. Lightweight and low in bulk with Superior Warmth, this dual surface knit allows moisture to be continuously pulled from the skin and diffused to the outside. Reduced fabric weight offers increased warmth and compressibility. Grid construction enhances both wicking efficiency and breathability by generating channels of targeted touch points that absorb and diffuse moisture vapor for faster evaporation.