Young Blonde Girl Wearing Rainbow Socks

The layer of leather or other material covering the insole of a shoe is also referred to as a sock. When only part of the insole is covered, leaving the forepart visible, this is known as a half-sock.
Footwraps
Footwraps, pieces of cloth that are worn wrapped around the feet, were worn with boots before socks became widely available. They remained in use by armies in Eastern Europe up until the beginning of the 21st century.