These socks are engineered with an advanced zonal padding system that provides extra support and comfort to areas of the foot and leg. They boast a close supportive fit from foot to calf. Knit with Merino Wool for superb softness next to skin while providing excellent thermal and moisture control properties.Performance FitMoisture ManagementThermoFitFlat toe seamShockZonesY-HeelFabric: 34% Merino Wool, 33% Polypropylene, 32% Polyamide Nylon, 1% Lycra Elastane