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Product DescriptionThe Thermawool 1/2-Zip Shirt is made from 100% mercerized super soft merino wool jersey. The superfine merino wool fabric naturally manages moisture and temperature, insulating even when wet, and fights off odor with natural antimicrobial properties. No-itch wool is not only soft and warm, but also flame resistant and machine washable with a UPF rating of 50+ to protect your skin from harmful UV rays. Merino wool is an annually renewable resource. This breathable 180g fabric is constructed with flat seams, so that the 1/2-Zip Shirt functions perfectly as a medium weight base layer. Thermawool Long-Sleeve 1/2-Zip Shirt has a mock neck, set-in sleeves, ribbed trim, and logo zipper pull. Black.