One size fits most (UK 4-11) 80% cotton 15% polyamide 5% elastane The base colour as well as the toe and heel of the sock are knitted in 100% combed cotton thread, and the pattern details are knitted in polyester thread. Elastane is added in for stretch and durability! These socks feel breathable and soft, perfect for any season. 💜machine wash in cold water 💜tumble dry 💜do not iron and do not use bleach!