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Merino wool is<\/span> a super fiber. The best merino wool clothing somehow manages to be comfortable in 95-degree heat, and merino base layers keep you warm well below freezing. Unlike synthetic fibers derived from petroleum, merino wool is natural and renewable.<\/p>\n Merino wool\u2019s versatility means there\u2019s a bewildering array of blends and options to choose from. Here are our favorite merino wool products that we’ve tested by wearing and washing (usually in cold water, and hung to dry, although we do machine dry them just to see what happens) over the course of months and even years in some cases. Once you’re done here, don’t forget to check out the rest of our apparel guides, like the Best Merino Wool T-Shirts<\/a>, Best Base Layers<\/a>, Best Puffer Jackets<\/a>, Best Hoodies<\/a>, and Best Hiking Boots<\/a>.<\/p>\n Updated November 2025: We\u2019ve added several new T-shirts from Huckberry’s Proof brand and Taylor Stitch, a Minus33 base layer for extreme cold, Ridge Merino’s excellent Cloudripper merino-grid fleece blend, Wool&’s Roam Convertible Wrap Bra, and Proper Cloth’s exquisite dress shirt.<\/em><\/p>\n Table of Contents<\/p>\n