Why do shirts have pockets?

Shirt pockets have a long history dating back to the 19th century when shirts were primarily undergarments. As people started removing their outer layers, pockets were needed to hold small items like coins and keys. Shirt pockets serve a practical function by providing a convenient place to store small essentials. They offer benefits such as convenience, utility, organization, style, and protection. They have evolved over time to accommodate changing fashion trends and technological advances. In the future, pockets may evolve to accommodate new technologies, prioritize sustainability, and cater to diverse styles and occasions.