Hot Chillys Men's Premier Mid Volume Socks 44% polyester 27% nylon 18% micro Tencel 9% alpaca 2% lycra Made in the USA and Imported Odor Blocking Properties Moisture Channel Over the calf Machine wash cold MTF Moisture Transfer Fabric side panels wicks moisture away from the foot Bio Silver antimicrobial treatment Anatomically designed to the foot Medium Volume Sock Knitted with compression for increased circulation