A shoe is an item of footwear intended to protect and comfort the human
foot. Though the human foot can adapt to varied terrains and climate
conditions, it is vulnerable, and shoes provide protection. Form was
originally tied to function, but over time, shoes also became fashion
items. Some shoes are worn as safety equipment, such as steel-toe boots,
which are required footwear at industrial worksites. Additionally, shoes
have often evolved into many different designs, such as high heels,
which are most commonly worn by women during fancy occasions.