Many companies do use these small protective socks for mobile phones or ipods to promote their brand. Here is some more information about this funny promotional product.
It’s history as promotional item started in september 2004 when Apple launched a very nice array of Ipod socks.
The idea of using a sock to protect fragile objects isn’t new since hundreds of years ago they were already used it to protect glasses for example…
But using it as a promotional product is a good idea !
The difference between mobile phone socks and ipod socks is only the size as the ipod sock is slightly bigger.
Brands or images can be woven directly into the socks, like fornormal socks.