RoToTo Linen Cotton Ribbed Ankle Socks combine two different types of natural yarns using a special technique so that the cotton feels good against the skin on the inside and the linen feels cool and refreshing on the outside. The linen yarn is made from a high-quality raw material called "first-class flax," which is harvested in the Normandy region and has long and supple fibres among linen. The organic cotton yarn is spun by compact spinning, a method that prevents the formation of fluff. Linen/cotton mix Mid-weight, ideal for spring/summer Knitted on vintage machines Made in Japan