- LIGHTWEIGHT QUALITY BASE PAIR: 100% Merino wool, designed for first use with extreme comfort during outdoor activities. Thanks to their simplicity, crew-neck merino wool thermal underwear will become an essential part of your outdoor gear. ECO-FRIENDLY: Best in class easy care technology means your merino wool is machine washable and tumble dry friendly. Our 100% Merino wool is a renewable fabric. Its moisture-wicking properties mean you won't have to wash it as often, which means you'll use even less water.
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