This black sweatshirt has the large Sonic 2 themed embroidery work on it. The embroidered piece was actually available as a patch, but naturally some people would like it if it had already been applied to clothes. In this case, it appears on the back of a black hoodie sweatshirt. With the quality artwork/embroidery, no matter where Sega applied this patch, it seems to be a good move!
How about a Sonic sweat-suit?
This is unusual because it's a set, and also because it has Sonic pants. Sonic pants/shorts are far rare-er than tops of any kind. Both pieces are loaded with words. The pants say "Go Sonic Think Fast" and "Original Sonic Wear Totally Cool Quality Guarenteed" (in the lower circle) The shirt says "Original SonicWear Totally Cool The Hedgehog with Attitude Originated in the Green Hill Zone, super Sonic speed guarenteed" This was available 1991/1992 at Marks & Spencer stores.
It's unusual to get an actual sporting shirt with Sonic on it, but here it is. This is a Soccer /Football jersey type shirt with a Sonic theme. The small chest logo has Sonic kicking a soccer ball, and his name. The rest of the shirt is covered in stripes of this odd shiny woven-in thread. This isn't like some decal or detail that is going to rub off.
Each stripe has rows of stock/line art Sonics including, winking Sonic, normal Sonic, and Tired Sonic.There are also soccer / football balls in the rows. This is another Marks & Spencer item from around 1992. It looks quite quality and is also rather unusual.