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NATO-Developed Military Grade Design - Originally engineered for NATO and the Norwegian Armed Forces, this zip polo delivers field-tested warmth and durability now adapted for civilian outdoor and everyday use. Flatlock Seams for Added Comfort - Enhanced zip polo with knit terry comfort under jackets or workwear, ribbed cuffs keep sleeves securely in place during active movement. Essential winter gear for men, women & teens. Wool Blend Construction - Combine the breathable softness of merino wool with the strength of polyamide - resists stretching, retains shape, and offers lightweight warmth for daily wear, cold-weather training, or layering. Ethically Sourced Apparel - OEKO-TEX certified merino wool blend - a renewable, biodegradable fiber free of harmful chemicals - essential for eco-conscious customers seeking performance and responsibility in every stitch. Essential Cold Weather Supplier - Janus Wool has provided gear to NATO, the military, athletes, and outdoor enthusiasts worldwide - the legacy continues through thoughtfully engineered wool apparel and accessories for generations of adults and teens. Color Black Pattern Solid Seasons Winter Fit Type Straight Brand Name Janus Model Name Norse Terry Zip Neck Style Collared Neck Style Name Thermal Underwear Unit Count 1 Count Fabric Type 80% Merino Wool, 20% Polyamide Sleeve Type Long Sleeve Material Type Wool Blend, Polyamide Import Designation Imported Apparel Closure Type Zipper Age Range Description Adult Fit to Size Sentiment Positive Apparel Fabric Stretch No Stretch Item Length Description Standard Length Product Care Instructions Machine Wash Sleeve Length Description Long Sleeve Apparel Fabric Weight Class Lightweight