The material composition depends on the type of sock you’d like to order. Please visit the Our Styles page and select a specific product to see its material makeup. Our most popular blends are also listed below:Cotton Crew: 80% Combed Cotton, 15% Polyester, 5% SpandexAthletic Crew: 80% Combed Cotton, 15% Polyester, 5% SpandexBamboo Crew: 70% Bamboo, 15% Polyester, 10% Combed Cotton, 5% SpandexNylon Athletic: 80% Nylon, 10% Spandex, 10% ElasticCotton Ankle: 80% Combed Cotton, 15% Polyester, 5% SpandexSublimation Crew: 85% Polyester, 10% Spandex, 5% Elastic360° Sublimation: 85% Polyester, 10% Spandex, 5% ElasticWool Crew: 80% Merino Wool, 10% Nylon, 10% SpandexWool Athletic: 80% Merino Wool, 10% Nylon, 10% SpandexCotton Knee High: 80% Combed Cotton, 15% Polyester, 5% SpandexBaseball/Softball: 80% Nylon, 10% Spandex, 10% Elastic