I took a long time in selecting the right socks based on customer reviews and these sock did not dissapoint. I bought these for my son for school. The socks required for his school uniform are made of nylon and I refused to buy them since we live in Barbados and his feet would be sweating all day. From the minute he put these on he raved about how comfortable they were and they are tight enough so that they don't slide down during wear. Go ECCO!