Check the listing for details. USGI ECWCS Military Cold Weather Undershirt Brown Quarter Zip Medium. Color: Multicolor, Condition: Used, Made in United States. Listed at 30.00 USD. Authentic USGI ECWCS (Extended Cold Weather Clothing System) military undershirt built for warmth and durability in cold conditions. This brown quarter-zip pullover is designed for layering, offering lightweight insulation while staying breathable and comfortable. Features a soft fleece interior for added warmth without bulk. The quarter-zip allows easy temperature control, and the neutral brown color makes it versatile for tactical, outdoor, or everyday wear. Ideal for hiking, hunting, workwear, or casual cold-weather styling. First photo is AI-enhanced for representation only. Actual item is preowned. Please review all photos and the full description. Measurements are approximate. Measurements (approx): Pit to pit: ~22–23” Length: ~26–27” Sleeve: ~24–25”