Men's 4F thermal leggings - functional thermal underwear for every season Men's thermal leggings are a reliable foundation for any outdoor outfit, designed for activities in variable weather conditions. Seamless construction and elastic fibers guarantee a perfect fit, minimize the risk of chafing, and ensure comfort even during intense exertion. The slim-fitting cut and 7/8-length fit make these tights feel like a second skin, offering complete freedom of movement and effective thermal insulation. High-quality synthetic material with 7% elastane ensures stretch, durability, and easy care. Technical knit fabric with 4FSkin technology supports thermoregulation and effectively wicks moisture away from the skin. The elastic waistband with elastic keeps the gaiters securely in place, regardless of the activity. This model is best used as a first layer under a fleece, softshell, or insulating layer. It's a practical choice for hiking, backpacking, and other outdoor activities year-round. Men's thermal underwear (bottom) - features Slim cut – tailored to the body 7/8 length – ends just below the ankle Synthetic material – durable and easy to care for 7% elastane – stretch and freedom of movement Solid colors – universal fit Seamless construction – no chafing, maximum comfort Elastic waistband with rubber - stable fit 4FSkin technology – supports thermoregulation and fit