This BIRKENSTOCK sock is made from certified organic cotton. The pressure-free, elasticated cuff guarantees maximum comfort. The color-contrasting stripes and the BIRKENSTOCK logo at the ankle add a sporty touch. Cotton mix for a snug fit Details: original BIRKENSTOCK footbed comfort sole Components: 74% organic cotton, 24% acrylic, 2% elastane Sizing Small: US L5-L7 / EU 36-38 Medium: US L8-L10 / EU 39-41 Large: US M9-M11 / EU 42-44