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Stay warm, dry, and comfortable with this Smartwool Intraknit Thermal Merino 200 base layer. Constructed with a blend of Merino wool and performance fibers, it’s designed for warmth, moisture management, odor resistance, and easy layering. Seamlessly knit mesh ventilation zones create added breathability, and 3D body-mapping knit construction allows for a near-custom fit and unrestricted movement. Made in India with 52% Merino wool, 45% polyester, 2% elastane, 1% polyamide.