• HeatGear® fabric wicks sweat away from your skin to keep you cool, dry & light
• Anti-odor technology prevents the growth of odor-causing microbes
• Dynamic Arch Support helps reduce foot fatigue
• Strategic Cushion reduces bulk, delivers flexibility & breathability
• 97% Polyester, 3% Elastane 

Size M is for shoe sizes 4 to 7.5
Size L is for shoe sizes 8 to 12