Midweight merino wool-blend wicks sweat & dries fast to keep you comfortable in all conditions; Medium cushioning placed strategically throughout foot protects high-impact areas without added bulk; Dynamic arch support reduces foot fatigue; Odor control technology reduces odor in the sock; Seamless toe delivers superior comfort & reduced irritation; Left/Right specific fit & design; 43% Polyester/40% Wool/14% Nylon/3% Elastane