Falke Men's Cool 24/7 Invisible Sock 80% Cotton, 18% Polyamide, 2% Elastane Imported Pull On closure Machine Wash Extremely low cut sock that gives the illusion of Disappearing into the shoe Non-slip backing to keep sock in place Designed to keep foot cool and dry Lay flat to dry Disappears from sight in your shoe Non-slip silicone backing ensures perfect hold on the foot Fresh and dry feeling against your skin