These iconic socks feature the "NODAL" logo on the back.They are knitted in a mid-gauge and the soles are pile-knitted for cushioning and just the right thickness.Support rubber is placed on the instep for a better fit to the foot.The material is a cotton and acrylic blend yarn that has been treated with an antibacterial and deodorizing agent. -Body-Cotton/Acrylic/Nylon/Polyurethane-Size-23cm-27cmMADE IN JAPAN. *Although the product has been treated to prevent color fastness, we recommend washing it alone for the first few times.*When knitting the product, there may be seams and slight fraying, but please note that this does not affect the quality of the product.*The color of the product may differ from the image depending on your computer or smartphone environment.*Please refrain from using a dryer or washing at high temperatures as this may cause significant shrinkage.