The Gamakatsu G - Socks Thermal are designed for active outdoor pursuits such as fishing, hiking and hunting. The socks feature a blend of 59% Polyester (Thermolite®), 39% Polyamide and 3% Elastane which provides all-weather comfort. The socks are ergonomically designed and feature a performance fit that helps prevent slipping, blisters and pull moisture away from the skin.