The history of slippers dates back thousands of years. Designed primarily for comfort and home use, these shoes have undergone many changes over time. Here is a history of slippers and their changes from the past to the present:

1. Ancient Times

Slippers have existed since the earliest periods of human history. In ancient Egypt, Greece, and Rome, people wore simple, lightweight shoes that were similar to today's slippers. During this time, slippers were usually made from natural materials such as wood, plant stems, or leather. In ancient Egypt, mummies have been discovered showing that people used slippers made of reeds or plant stems to walk in hot areas.

2. Middle Ages

During the Middle Ages, slippers were mostly in the form of comfortable home shoes, but their use was limited to certain classes of society. Some slippers were made of leather or soft fabrics during this period. At this time, slippers were more known as a symbol of comfort and coziness at home and were less often used outside the home.

3. The 19th Century and the Industrial Revolution

With the beginning of the Industrial Revolution in the 19th century, the production of slippers entered a new phase. Industrial machinery helped mass-produce slippers, and different types of slippers were produced using different materials such as leather, fabric, and rubber. One of the major developments of this period was the use of rubber in the production of slippers, which increased their comfort and durability. Slippers gradually entered the streets during this period and were used as everyday shoes in many parts of the world.

4. The 20th Century: Diversification and Specialization

In the 20th century, the production of slippers expanded significantly, and different types of slippers were designed for specific applications. Among the major changes during this period are the following:
• Plastic slippers: In the early decades of the 20th century, plastic was introduced as a cheap and durable material for the production of slippers. This change made slippers more accessible and diverse for the general public. 
• Sanitary slippers: In the second half of the 20th century, sanitary slippers were designed specifically for use in wet environments such as bathrooms and swimming pools. These slippers were usually made of plastic or waterproof materials. 
• Fancy slippers and various brands: During this period, slippers were also considered from the aspects of fashion and beauty, and various brands began to produce luxury and fancy slippers.

5. 21st Century: Modern Slippers and New Technology

In the 21st century, slippers have not only improved in terms of design and comfort, but also technological advances have been applied in their production. Some of these changes include:
• Lightweight and ergonomic slippers: The use of new materials and advanced technologies has made slippers lighter and more comfortable. Ergonomic slippers, designed in the shape of the human foot, can help improve foot health and comfort. 
• Antibacterial and antiviral slippers: In the post-COVID-19 pandemic era, the production of slippers with antibacterial and antiviral properties has increased dramatically. These slippers are usually made of special materials such as silver nanoparticles.
• Smart Slippers: In today's world, some companies have started producing smart slippers that can collect information about walking, distance traveled, and even foot health.

Conclusion

Slippers have experienced many changes since the beginning of human history. From the simplest shoes made of natural materials to today's modern and technological slippers, these changes reflect industrial advances, cultural and health needs, as well as attention to human comfort and health. Today, slippers are available in different types for different uses and are considered one of the most essential comfort items at home and outside.