Is the oldest form of fabric in the history of mankind. Its history can be traced back to at least 6，500 BC and at least 8，000 years ago. It belongs to the form of non-woven fabric， which is earlier than the technology of textile and knitting Used by humans. Both soft and tough hair characteristics， good fiber flexibility， feel comfortable， but also has a good reduction. Because the wool felt products folded， can quickly return to its original shape， not easily deformed. Coupled with its fiber structure can be closely entangled， its tough features do not need through knitting， sewing and other processing， can be fully integrated.