Cotton.Machine Wash.Size: 22-24cm (suitable for 36-40 shoe code).Comfortable Fabric - The Toe Socks are made of Cotton, which are super stretch and can offer you great comfort.Elasticity and Well-Fitting - The great elasticity makes our five finger socks well-fitting to most people.Prevent Forming of Blisters -toe socks can help prevent those pesky blisters from forming in between your toes. They help reduce friction from your toes rubbing against each other, and your toes rubbing against your shoe. With that lack of friction, you can say goodbye to blisters.Multi Color Package.(Color as picture show) Set has 6 pairs socks in these colors.OCCASION: Quarter socks fit Spring, Summer.Autumn,Winter.Machine wash and hand wash.