ULTRA LIGHT. HEAVY ON COMFORT AND DURABILITY. FOR A BREATHABLE BARRIER BETWEEN YOUR FOOT AND SHOE WITH NO ADDED CUSHIONING, TRY ULTRA LIGHT FOR A BARELY THERE FEEL. Ideal for lower impact activities, but built to withstand each and every stride thanks to Infiknit technology for guaranteed durability. Meet your new favorite performance sock... so comfortable you may not even know you have them on.