Socks for sandals “Silk cotton sandals socks” have been commercialized and started to be sold.

The product was developed to eliminate customer dissatisfaction that
“when wearing bare feet, sweat from the soles and toes may cause shoe rubbing.” ‥
Uses highly hygroscopic silk and cotton to absorb sweat from the soles and fingers
and prevent odors and stuffiness. Two types, a five-finger type and a tongs type, are on sale.