Features of Smartwool Men's Run Targeted Cushion Low Ankle Pattern Sock 4 Degree elite Fit system for a dialled-in, Performance-oriented Fit Mesh zones for added breathability Virtually seamless toe for enhanced comfort Achilles tab prevents sock from slipping into footwear Height: Low ankle Targeted cushion Fabric Details 54% Merino Wool 29% Nylon 14% Recycled Nylon 3% Elastane 54% Merino Wool 29% Nylon 14% Recycled Nylon 3% Elastane