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Finding a matching pair of socks has always been a tricky problem for us especially for the blind people. The button is designed for the blind. It can be sewed on the socks so that the blind can buckle the two buttons together. Thus the chance of a pair of socks being separated is greatly reduced. Plus, the blind can also match the two socks together with the help of the braille. Find a matching pair of socks is no longer a problem for the blind.