Be. Different Mid-weight Men's 2 Pairs Merino Wool Hiking & Outdoor Socks Black 66% Merino Wool/32% Nylon/2% Elastane MOISTURE & TEMPERATURE REGULATION: These socks uniquely react to changes in body temperature and perspiration level to keep your feet comfortable in all weather conditions. The fibers used in these socks actively wick sweat and other moisture away from your body and release it into the air as vapor, keeping your feet dry and comfortable even during times of extreme exertion. Renowned for their insulating abilities, the fibers will also keep your feet warm when the temperature drops! COMFORTABLE: These socks are soft to the touch, and have a snug athletic fit to prevent blisters and provide support. Merino wool is much finer and softer than traditional wool, and will NOT causing itching or other skin irritations. ODOR CONTROL: Unlike synthetic fibers, Merino wool is naturally anti-bacterial, making it resistant to odors even when you're actively perspiring. These socks can be worn multiple times without washing (although we do recommend airing them out). MID-WEIGHT: Perfect for any season, and all weather conditions MEDIUM: Fits Men's U.S. shoe size 5-10