When 80s Casuals started the idea of putting a pair of trainers onto the front of a T-Shirt was incomprehensible. We continued though unabated and the idea took off as the retrospective idea brought back many memories of the 80s Casual era.
Here's a short 80s Casuals video from a few years back when it was possible to put trainers on T-Shirts.
Nowadays there's a few brands doing it but adidas themselves seem to have cornered the market which we suppose as the saying goes means 'Imitation is the best form flattery'.