Merino Wool for warm, dry and comfortable feet: The highest quality Merino Wool in our unisex crew compression hiking/sports socks has natural heating, cooling, and antibacterial properties that keep your feet warm in the winter and feeling fresh in the summer. Compression Benefits. Not just your average wool socks! - these highly advanced socks also give you the added benefit of a 20-30mmhg compression rating. This aids the flow of oxygen to the muscles which improves performance and reduces fatigue. Each sock behaves like a second layer of muscle, gently squeezing stretched vein walls. This built-in feature helps fight the force of gravity and circulates blood back up to the heart more efficiently. Temperature Control: Merino wool has a natural temperature control property that allows your body to quickly regulate to the surrounding weather or activity you are undertaking keeping your body (feet) temperature constant. For additional temperture control we have included larger ventilation mesh sections on the top of the foot that optimize airflow and wick moisture away from the skin Blister Reduction. The padded footbed, toes and heels help to reduce the risk of getting blisters. 30% Merino Wool, 15% Polyester, 17% Polyamide, 33% Acrylic, 5% Elastane Our crew compression socks are your perfect go-to hiking socks. They are designed for long days mountain climbing / hiking, cold cycling commutes, everyday walking, outdoor workers, outdoor adventurers, travellers or daily use as a thermal sock in cold autumn/winter months