Fabric: Quick-Dry, Lightweight Comfort Stretch Knit (100% Polyester). Stretch Thumb Loops: Shed layers with ease without compromising the rest of your system. Polygiene® Odor Control Technology safely neutralizes odor caused from sweat. GORE™ OPTIFADE™ Concealment Subalpine is designed for stalking and ambushing ungulates from ground level in tree-covered and vegetated terrain.