This item is described as 'a flanel'.
Yes but a flanel what? Flanel is a type of soft cloth but really what are you going to do with a cloth square? (if it's Sonic, collect it!)
This was produced for Sonic's birthday in 2009, and it also promotes the moblie site for your phone. The text says "Born on June 23, 1991 I'm in the mobile site puyosega.com It is a prize in a contest held around Sonic's birthday for that year.